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].

[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.
[A]: BPA


[Q]: A group of British tourists taking part in a sunset cruise along the Zambezi River were left horrified after seeing crocodiles eat a man, it has been reported. The tour group and their guide were making their way down the river between Zimbabwe and Zambia when they saw crocodiles feeding. But as they approached, it became clear that the reptiles were tearing apart the bottom half of a human. Horrified British tourists saw crocodiles eating a man on the banks of the Zambezi River between Zambia and Zimbabwe (file picture) The Daily Telegraph reports that the tourists alerted authorities - but by the time officials had arrived to investigate, the remains of the body had vanished.British tourists were taking part in a sunset cruise along the Zambezi RiverThey spotted a number of crocodiles feeding on the banks of the riverBut they were horrified to see that the reptiles were eating body of a manGroup alerted officials but remains had vanished by the time they arrivedIt is thought body may have been a poacher shot by rangers days earlier 
 Question:It is the latest in a series of crocodile attacks in _ and three children are reported to have been killed by them in the last three months.
[A]: Zimbabwe


[Q]: Washington (CNN) We're still a long, long way from starting to even kinda, sorta think about impeachment. Exhibit A: Democratic Rep. Al Green of Texas forced a vote on the House floor to table a plan to impeach Trump on Wednesday. The vote to sideline the impeachment resolution passed with flying colors: a bipartisan 364-58 margin. And while nearly five dozen Democratic members of Congress took to the chamber's floor to cast their votes in favor of mulling impeaching Trump, more than twice as many Democrats opted to cast their ballots against the proposal. A new poll from the Public Religion Research Institute on Tuesday found that seven in 10 Democrats believe Trump ought to be impeached and removed from office. Still, only about three in 10 of House Democrats actually voted to consider impeachment on Wednesday.House members from more heavily Democratic districts were more likely to back considering impeachmentDemocrats voted against considering impeachment by more than a 2:1 margin on Wednesday 
 Question:It's not a particularly novel idea that _ in potentially more vulnerable seats are less likely to get on board with an idea that, at least in this moment, is still not even near politically ripe for the party bosses.
[A]:
Democratic