NEW YORK — A question about fossil-fuel-industry donations to her campaign unleashed a flash of anger from Hillary Clinton on the rope line in New York on Thursday.

The moment was recorded by an activist, whom Greenpeace identified as Eva Resnick-Day, who sought to pressure Clinton about the roughly hundreds of thousands of dollars her campaign has received from individuals with ties to fossil-fuel industries.

“Will you act on your word to reject fossil-fuel money in the future in your campaign?” Resnick-Day asked after thanking Clinton for addressing climate change in her campaign.

Apparently peeved, Clinton fired back flashing a frustration that had begun to show earlier in the rally when a large group of Sanders supporters interrupted her speech.

“I have money from people who work for fossil-fuel companies,” Clinton said.

As Resnick-Day tried to respond, Clinton interrupted her pointing her finger for emphasis: “I am so sick — I am so sick of the Sanders campaign lying about me.”

“I’m sick of it,” she added before moving on to shake another hand.

The Sanders campaign has said that they will hammer Clinton for her ties to the fossil-fuel industry through campaign donations.

And Greenpeace, a progressive environmental organization, released a recent report showing that Clinton had also received more than $1.2 million in donations bundled — or fundraised — by lobbyists for fossil-fuel industry on her behalf. The organization also tied millions more donations tied to the fossil-fuel industry to the super PAC supporting Clinton, Priorities USA Action.

She has not accepted any direct contributions from oil and gas companies.

But Resnick-Day said in an interview with The Washington Post that she has no ties to the Sanders campaign and has not committed to any candidate in the race. She and other Greenpeace activists have confronted Clinton several times on the rope line with the same question in the past.

“I think that she has been annoyed to continually be asked the question on the trail and didn’t really want have to deal with the question again,” the 26-year-old activist from Pittsburgh said. “I was upset that she felt that I was a Bernie campaigner, because I’m not.”

“I didn’t like that assumption,” she added.

Resnick-Day said Greenpeace has asked all of the presidential candidates to sign a pledge to reject money from the fossil-fuel industry and to pursue campaign finance reform. Sanders has signed the pledge but Clinton has not.

But Clinton’s tone didn’t really bother her as much as her continued reluctance to sign the pledge, Resnick-Day said.

“The tone at which a candidate talks to me is not what matters to me, it’s the substance of what the candidate is saying,” she said. “And I’d love to see Hillary come out and take the pledge to reject fossil-fuel money, especially if she’s saying she did not take any, there’s no reason that she can’t sign the pledge.”

And another incident may have contributed to Clinton’s mood. Earlier in the rally, a large group of chanting Sanders supporters interrupted Clinton’s remarks and walked out prompting Clinton to fire back at them from the podium.

“As they’re leaving, I just want to say I have earned over 9 million votes in this election,” Clinton said, adding that she has received more than 2 million more votes than Sanders. “What I regret is they don’t want to listen to anybody else.”

“What I regret is that they don’t want to hear the contrast between my experience, my plans, my vision, what I know I can get done and what my opponent is promising,” she added.

But the Sanders campaign isn’t backing down.

Michael Briggs, a spokesman for Sanders, said that Clinton’s campaign has relied “heavily” on money from lobbyists working for the oil, gas and coal industries.

“It’s no wonder that back in December Clinton refused to agree to stop accepting money from the fossil fuel industry when pressed at a town hall, saying, ‘I’m not going to do a litmus test on them,'” Briggs said in a statement. “If Secretary Clinton wants to discuss this and other important issues she should stop stalling and agree to a debate in New York before the April 19 primary election.”

The Clinton and Sanders campaigns have been deadlocked over the issue of a debate that the Sanders campaign has pushed to be held in Brooklyn, N.Y., ahead of the state’s primary.

$hillary Clinton Meets The Frackers !