At their meeting in january of 1942, what argument persuaded president roosevelt and prime minister churchill to pursue a “europe-first” strategy?

The correct answer for the question that is being presented above is this one: "At their meeting in January of 1942, the argument persuaded President Roosevelt and Prime Minister Churchill to pursue a “Europe-first” strategy is that it would be better to first take Sicily then Italy saying the communication lines are not good and it would not be easily to pull them out in an event of an invasion of Northern Europe."