PLZ HELP ME THIS IS THE LAST QUESTION I HAVE
What helped ensure that the United States upheld its policy of isolationism?

A. Lack of funding led the United States to avoid acts of war.
B. Concerns over trade agreements led the United States to remain neutral.
C. The Atlantic and Pacific oceans acted as buffers on both sides of the country.
D. Lack of a superior military led the United States to avoid acts of war.