I think that the sides for WW3 would be: Coalition: USA, UK, France, most of EU, and Nato, Japan, South Korea
Allegiance: Russia, China, N. Korea, Iran
Would you agree?

Yeah, but I would switch china to the Coalition. Remember, the USSR was part of the Allies, and we aren't ~technically~ enemies with China. At least not yet.

Explanation:

(b) britain had a much larger navy than the u.s.

(d) the u.s. had a small army compared to britain.

i think the answer is   b.