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]: We're not bluffing, the Obama administration told Afghanistan on Tuesday in announcing for the first time it has started planning for the possible withdrawal of all U.S. troops by the end of the year if no security agreement is signed. Statements by the White House and Defense Secretary Chuck Hagel showed President Barack Obama's impatience with Afghanistan President Hamid Karzai's refusal to sign the agreement that would keep several thousand American troops in the country after combat operations conclude this year. In a phone call with Karzai on Tuesday to discuss upcoming elections for a new Afghan leader, Obama made clear that time was running out to properly plan for keeping any U.S. forces in the country beyond 2014, the White House said.President Obama calls Afghan leader to discuss security agreementObama orders planning for bringing home all U.S. troops at the end of 2014Afghan President Karzai refuses to sign a deal to keep some troops thereThe White House says an agreement could happen after Karzai leaves office in April 
 Question:Obama, he said, has been very clear that the possibility of U.S. troops staying in Afghanistan depends "on whether we have a bilateral security agreement signed by the Afghani government, to assure our rights of our troops and other important elements that are required any time _ has troops in another country."
[A]: U.S.


[Q]: (CNN) After a slow start in October, flu season in the United States is gaining speed, particularly in the South. Flu activity, which has been increasing since the start of November, is now higher than usual for this time of year, according to a report published Thursday by the Centers for Disease Control and Prevention. Flu is a contagious, viral illness that causes mild to severe symptoms that, in rare cases, can lead to death. Seven children have died, and an additional 856 flu-related hospitalizations have occurred as of December 2, according to the CDC's weekly surveillance report. "Flu is increasing. We're seeing a pretty steep increase in influenza activity across the US but especially in the South," said Brendan Flannery, a co-author of the new report and an epidemiologist in the CDC's flu division.Flu activity is higher than usual for this time of year, CDC saysLouisiana, Mississippi and South Carolina report the highest activitySeven children have died, and there have been 856 hospitalizations 
 Question:Her advice includes the _ recommendation to get a flu shot, but she also adheres to low-tech techniques of contagious disease prevention: "good hand-washing techniques, teaching kids not to share their germs, staying home when you're sick and disinfecting common surfaces," she said.
[A]: CDC


[Q]: (CNN) As is often the case after a terrorist attack, President Donald Trump quickly took to Twitter after Friday's explosion on the London Underground that injured more than 20 people. Trump tweeted, "Loser terrorists must be dealt with in a much tougher manner. The internet is their main recruitment tool which we must cut off & use better!" While the identity of the terrorist or terrorists behind the London explosion is still unknown, Trump is right that many of the "homegrown" terrorists in the West who have carried out attacks in recent years are often failures who find an ideology such as that of ISIS a useful anchor for their grievances. As self-styled ISIS "soldiers," they can become the heroes that they imagine themselves to be, rather than the losers they often actually are.Trump's tweets after latest London incident raised issues that bear examination but reflect a confused approach to the problem, Peter Bergen writesThe Internet is indeed the main recruiting tool of terrorist groups but to "cut off" that channel is a monumental challenge, he says 
 Question:Sure, an _ beheading video or photo is easy to remove from social media platforms as it violates the terms of use of most social media companies, which do not allow content that incites violence.
[A]:
ISIS


