What was one benefit of the Allied forces’ taking control of North Africa? A - From there, they could move to invade Italy.
B - From there, they could stop Japanese advances.
C - North Africa was the site of prisoner-of-war camps.
D - The Allies could move into the Middle East from North Africa.

Control of North Africa deprives the Axis powers of complete naval dominance of the Mediterranean Sea, which brings security to the Suez Canal, a vital link between Great Britain and its colonies in India and Southeast Asia. So your answer is B

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.