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]: Havana (CNN) U.S. President Barack Obama put the authoritarian government in Havana on the spot Monday, taking questions from reporters and insisting that his Cuban counterpart also deliver answers to pointed queries on human rights, political prisoners and economic reforms. Though they both acknowledged deep disagreements on these issues, the two leaders found common ground on the topic of the economic embargo on Cuba, which both want lifted. Obama went so far as to declare that "the embargo's going to end," though he couldn't say when. In an extraordinary sign of the shifting attitudes, Castro was willing to answer one question on why his regime was keeping Cubans incarcerated for expressing anti-government views. But his response only underscored the schisms between himself and Obama.President Barack Obama and Cuban leader Raul Castro shook hands at the Palace of the Revolution in Old Havana on MondayScores of anti-Castro dissidents from the group Ladies in White were arrested over the weekend and detained after their weekly protest"¿Que bolá Cuba?" the U.S. President wrote on Twitter on Sunday, using an informal Cuban greeting 
 Question:On Sunday, Obama's interactions with everyday _ were carefully calibrated.
[A]: Cuban


[Q]: Rio Ferdinand believes Louis van Gaal's decision to return Wayne Rooney to his favoured attacking role has led to the Manchester United's upturn in performance levels. Writing in his column in The Sun ahead of the Manchester derby on Sunday, Ferdinand, now at Queens Park Rangers, revealed his belief that Rooney playing as a striker is fundamental to United hitting fifth gear. He praised Van Gaal for moving his captain further up the field after a spell in the centre of the pitch at the start of the year but admitted the return to form and fitness of Ander Herrera, Marouane Fellaini and Michael Carrick has also been important.Rio Ferdinand says Manchester United need Wayne Rooney in attackHe believes Rooney's form has been key to their upturn in performancesFerdinand said United's 2-1 win at Anfield shows they are 'on to something'Manchester United vs Manchester United: The expert view of the derbyCLICK HERE for all the latest Manchester United news 
 Question:Ferdinand also pointed to the return of midfield player Michael Carrick (left) as a help to _.
[A]: Manchester United


[Q]: (CNN) -- Nearly one out of every five NATO soldiers killed in Afghanistan this year were killed by Afghan police or army forces. Nine of the 16 victims were U.S. soldiers. This pattern of attacks raises a fundamental problem for the plans of the United States and other NATO countries to draw down their forces over the next two years. That plan is, in part, predicated on the idea that as Afghan forces take the lead in security operations, they will be supported by small numbers of U.S./NATO advisers embedded in Afghan army and police units. Those advisers will be quite vulnerable to attack.Peter Bergen: NATO troops falling victim to shooting by Afghan forcesHe says the trust that once existed between NATO, Afghans has been erodedPlans for drawing down U.S., NATO troops assume handover of duties to AfghansBergen: Does NATO have a Plan B? 
 Question:Monday's shootings were the latest in a wave of attacks on international troops by Afghan security forces, prompting concerns over the stepped up frequency of what _ terms "green-on-blue" incidents.
[A]:
NATO