In the months leading up to World War I, the United States wanted to maintain its neutrality because
A) President Wilson was a Quaker and was against warfare of any kind.
B) the armed forces were preoccupied with problems on the Mexican border.
C) the U.S. had the strongest navy in the world and it was needed to keep the coastline secure.
D) the U.S. was trading heavily with European nations and did not want its business interrupted.