In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
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Question: (CNN) Though many individuals likely contributed to the President's decision to fire FBI Director James Comey, one notable one may have been Roger Stone, a 64-year-old close friend of Donald Trump and central figure in the FBI investigation into Trump campaign ties to Russia. In the middle of the Watergate scandal, Stone, who engaged in dirty tricks during Richard Nixon's 1972 campaign, was discovered to have hired a Republican operative to infiltrate the George McGovern campaign and was subsequently fired from his job. After the President's resignation, Stone remained an ardent Nixon apologist and loyalist. He even had the man's face tattooed on his back and devoted his life to ruthless, anything-goes politics (or political consulting, as you may know it). Stone's motto was and continues to be: "Admit nothing, deny everything, launch counterattack." And anyone who has watched Trump closely over the years would think it was his personal slogan, too.Michael D'Antonio: Roger Stone has undoubtedly influenced President Trump's decision to fire James ComeyAs an old friend and political adviser, Stone has taught Trump be ruthless -- particularly when protecting himself from attackTherefore Comey, who was leading the investigation into Trump campaign ties to Russia, had to be taken out, writes D'Antonio 
 Question:_ has adopted a similar approach to dealing with those who oppose him.

Answer: Donald Trump


Question: (CNN) Your "BPA-free" plastic product may be no safer than the product it replaced, says a new UCLA study that analyzed the impact of a common BPA alternative on zebra fish embryos. The study joins a small but growing group of similar research sounding the alarm about so called "BPA-free" alternatives. "Our findings are frightening and important," said senior author and reproductive endocrinologist Nancy Wayne. "Consider it the aquatic version of the canary in the coal mine." After decades of animal research linked BPA (Bisphenol A), a known endocrine disruptor, to problems with brain and reproductive development, early puberty and a rise in breast and prostate cancer, many manufacturers stopped using the chemical to harden plastics, replacing it with "BPA-free" alternatives. The most common replacement is BPS (Bisphenol S), said Wayne.BPA-free alternatives may be no safer than BPA, say researchersMost common alternative, BPS, linked in study to disruptions of estrogen and thyroid hormones 
 Question:In addition to the effect on estrogen, the study also found both _ and BPS affected the thyroid hormone system.

Answer: BPA


Question: Washington (CNN) President Donald Trump, in a conversation with Mexican President Enrique Peña Nieto, labeled New Hampshire "a drug-infested den," according to a transcript of Trump's January 27 call that was published by The Washington Post on Thursday. The comment was quickly decried by Republican and Democratic lawmakers in the Granite State, including the state's Republican governor who endorsed Trump during the 2016 campaign. During the call, according to the Post, Trump lashed out at Peña Nieto for the quantity of illegal drugs that come into the United States from Mexico. "We have a massive drug problem where kids are becoming addicted to drugs because the drugs are being sold for less money than candy," Trump said.Trump lashed out at Peña Nieto for the quantity of illegal drugs that come into the US from MexicoHe later bragged that he won the Granite State because of the opioid epidemic 
 Question:The issue was so critical to _ that he headlined an event in New Hampshire focused strictly on opioids days before the 2016 election.

Answer:
Donald Trump