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]: Washington (CNN) The advertised purpose of President Barack Obama's pre-vacation news conference Thursday was to highlight gains in the war against ISIS in Iraq and Syria with the Pentagon as a backdrop. But for all his talk of terrorism, Russia and other geopolitical challenges, the underlying argument he wanted to make was clear: it's a serious business being commander-in-chief and the Republican who wants his job isn't fit for the Oval Office. Obama ridiculed Donald Trump's recent suggestion that the election system could be rigged, called on the candidate to act like a president since he's soon to be briefed on confidential information and implied that he didn't believe the billionaire businessman could be trusted with America's nuclear codes.Obama hit out at Trump just two days after branding him unfit to be commander in chiefTrump and Clinton are expected to soon start getting classified intelligence briefings 
 Question:Obama pointed to many such challenges in Thursday's _ news conference, particularly the fight against ISIS, also known as ISIL.
[A]: Pentagon


[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 series of chilling text messages that a suicidal father sent to his increasingly panicked ex-girlfriend in the final moments before he allegedly threw their baby son to his death off a bridge has emerged. As he stood on Connecticut's Arrigoni Bridge with his seven-month-old son Aaden on Sunday night, Tony Moreno, 22, exchanged dozens of texts with his former partner, 19-year-old Adrianne Oyola. In separate messages, he told her: 'Enjoy your new life without us', 'There is no more days [sic]' and 'You're not a parent anymore' - prompting Oyola to frantically ask about her son's whereabouts. Moreno then wrote: 'He's dead', followed by 'And soon I will be too.' Shortly after, the father apparently leaped from the 90ft bridge himself - having already hurled Aaden into the water below.Tony Moreno, 22, admits throwing his seven-month-old son, Aaden, off Connecticut's Arrigoni Bridge - before jumping himself, officials sayOn night of alleged murder, he sent chilling texts to his former girlfriendHe told Adrianne Oyola: 'Enjoy your new life without us' and 'He's dead'An increasingly panicked Oyola begged for information about their childAs Moreno fell silent, she text him: 'Please don't hurt Aaden... Please!!!'On Tuesday, Aaden was found dead in Connecticut River 15 miles awayMoreno was rescued from water and is now alert and stable in hospitalHe has been charged with murder and is being held on $2million bondOyola had obtained a restraining order against Moreno but it was overturned on June 29 
 Question:Oyola, who lived with _ and his family until June 17, reportedly told police officers that she and her ex-boyfriend had not been getting along in the months leading up to Sunday's incident.
[A]:
Tony Moreno