Detailed Instructions: 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. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.
Problem:(CNN) -- He is arguably the most well-known American general since MacArthur, and perhaps the most effective since Eisenhower. Now Gen. David Petraeus takes on what many believe will be his biggest challenge yet: reversing the momentum of the Taliban in Afghanistan and helping to stabilize the rickety regime of Afghan leader Hamid Karzai. Petraeus faced far more daunting challenges in Iraq when he assumed command there in early 2007. Those challenges, and how they were overcome, are worth recalling as he assumes command in Afghanistan, as they may provide some indicators of the way forward there. First, Iraq was embroiled in a vicious civil war in which Shia and Sunni civilians were showing up dead on the streets of Iraq's cities at the rate of 90 a day, some tortured in the most unspeakable manner, their heads drilled open.Gen. David Petraeus, who has a Ph.D. from Princeton, wrote the book on counterinsurgencyPeter Bergen says Petraeus accomplished a huge turnaround in IraqThe general took many steps to gain public support for U.S. efforts in Iraq, Bergen saysHe notes Petraeus has said Afghanistan will be harder 
 Questions:There were also shifting dynamics on the ground in _ that would make the additional combat brigades of the surge a force multiplier rather than simply more cannon fodder for Iraq's insurgents. (A) CNN (B) American (C) MacArthur (D) Eisenhower (E) David Petraeus (F) Taliban (G) Afghanistan (H) Afghan (I) Hamid Karzai (J) Petraeus (K) Iraq (L) Shia (M) Sunni (N) Princeton (O) Peter Bergen (P) U.S. (Q) Bergen
Solution:
(K)