Definition: 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].
Input: (CNN) -- If the United States is serious about thoroughly defeating ISIS, it must -- somehow, some way -- go through Syria. But how? And in what way? Those are the big questions now, as President Barack Obama weighs what to do inside the war-ravaged nation where ISIS leaders are based and where the Islamist terror group rose to prominence. Obama ceded Thursday that "we don't have a strategy yet" for what to do about ISIS inside Syria, with a senior administration official adding that a decision is "a week or so" away. There are certainly options, but none is clear-cut.Obama: U.S. has no military strategy yet on what to do against ISIS in SyriaThere's been no hint of ground forces, but commandos did do a rescue missionAirstrikes are a possibility; a congressman says it's critical U.S. work with locals"There is no such thing as a no-risk strategy," Rep. Adam Smith adds 
 Question:If you can't pound _ into submission militarily, the reasoning goes, you can hit it where it hurts: the wallet.

ISIS