The correct answer is B) because its priority was to help its allies first defeat the Nazis.
The United States agreed to the "Europe First" strategy because its priority was to help its allies first defeat the Nazis.
We are referring to an important moment during World War II where the Allies decided to focus only on defeating the German army first, as the priority in the strategy of the war. The United States and Great Britain knew that they had to stop the Nazis and defeated in order to win the war, and they proceded that way. They also accord to fight the Japanese army in the Pacific Ocean but investing fewer resources.