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].

[EX Q]: (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.
[EX A]: BPA

[EX Q]: (CNN) A new "Special Relationship" between Britain and the US has emerged: the relationship between Donald Trump and Nigel Farage. Both men have turned voter disaffection into electoral triumph. Farage did so in the now infamous Brexit -- taking the UK out of the EU; Trump in winning the US presidency. Both men identified the other as a brother in arms along the way. So much so that at one recent rally, Trump told his supporters: "We are going to do something so special. It will be so special. It will be an amazing day. It will be called Brexit plus plus plus."President-elect Donald Trump bonded with Brexit leader Nigel Farage over common goalsBoth galvanized a large anti-establishment vote to win unexpected victories in 2016 
 Question:In victory, Farage was fast to say that one of the biggest Brexit campaign slogans, a £350 million a week rebate from the EU once the _ left, was untrue.
[EX A]: US

[EX Q]: WASHINGTON (CNN) -- Members of the Senate Finance Committee met Tuesday with treasury secretary nominee Tim Geithner over concerns involving his personal taxes and the immigration status of a former housekeeper, transition officials said. Timothy Geithner has been nominated for the post of treasury secretary in the Obama administration. The Geithners employed a housekeeper whose employment authorization document expired about three months before she stopped working for them in October 2005, according to a written statement from the Senate Finance Committee. Later, the housekeeper, who is married to a U.S. citizen, was granted a green card, transition officials said. The second concern involves Geithner's taxes while he worked for the International Monetary Fund (IMF). According to a statement released by the committee, Geithner failed to pay self-employment taxes while the IMF paid him from 2001 to 2004.Committee: Housekeeper worked for 3 months after employment document expiredGeithner failed to pay self-employment taxes while working for IMF, committee saysErrors were "honest mistakes," don't rise to "level of disqualification," chairman saysTax issue a "common mistake," incoming White House spokesman says 
 Question:The presidential transition team told _ staff about Geithner's taxes early last month, the committee said.
[EX A]:
Senate Finance Committee