Which statement about world war two is correct

A: The Japanese developed long-range rockets, called the V-2s, to launch against the United States

B: Stalin refuse to except aid from the United States because it was not a communis country

C: German submarines, called U-boats, snak many allied ships in the
Atlantic ocean

D: defend its territory in Asia and South America, Italy had to fight a two-ocean war

your answer is 2. correct me if I'm wrong

C: German submarines, called U-boats, sank many allied ships in the  Atlantic ocean is correct.

The Japanese did not develop long range rockets, the Germans did so A is incorrect. Stalin joined the allies so B is incorrect. Italy was not fighting in the ocean as far as i know. D is incorrect,

d.summerains, the last one

because mexico wanted to choose a centralized location