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].

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."
U.S.

Bryan Habana equalled Jonah Lomu's World Cup try-scoring record as he led South Africa into the quarter-finals with a crushing victory over the United States at the Olympic Stadium. Former All Black Lomu stood three tries clear of Habana on 15 heading into the match but the winger ran over a hat-trick against a much-changed USA side as the Springboks recorded a convincing 64-0 victory to top Pool B and set up a meeting with either Wales or Australia in the last eight. But Habana did miss a glorious opportunity to break the record as he knocked on unchallenged in the in-goal area.South Africa wing Bryan Habana scored three tries to take his tally to 15 in Rugby World Cup historyFrancois Louw scored twice as the Springboks ran in 10 tries during their Pool B clash at the Olympic StadiumVictory sees the two-time World Cup winners through to the quarter-finals of this year's tournament 
 Question:The third try came just a minute into the second half as _ beat a marginal offside call to collect a pass from skipper Fourie du Preez for the 13th World Cup try of his career.
Bryan Habana

(CNN) -- Grigor Dimitrov and Milos Raonic have often been talked about this year as being part of the next generation of players who can break up the dominance of tennis' Big Four. But judging by his display at the U.S. Open, Marin Cilic could be the most likely candidate. Cilic became only the third men's player outside Roger Federer, Rafael Nadal, Novak Djokovic and Andy Murray to win a grand slam title since early 2005 when he crushed Kei Nishikori 6-3 6-3 6-3 in under two hours in New York on Monday. Few, however, would have seen it coming -- last year the 25-year-old Croatian didn't play at the season's final major because he was serving a drug suspension.Marin Cilic defeats Kei Nishikori in New York to claim his first majorCilic and Nishikori were each playing in their first grand slam finalA year ago Cilic didn't play at the U.S. Open as he served a drug banNishikori was trying to become the first Asian man to win a major 
 Question:He showed his frustration at 2-4 after he struck a short ball that allowed _ to pounce with a forehand.

Marin Cilic