The answer is c)
Explanation:
Americans worked hard in factories to produce more equipment for the war effort.
A. The percentage of sea otters…
The sentence in which all pronouns are used correctly is C. I sat between him and her during the sales conference. A is incorrect because it shoud be "between you and me." B is incorrect because it should be "between her and me." D is incorrect because it should be "between him and me." Objective pronoun has to be used with the preposition <span>between.</span>
