The correct answer is the last option (correct as is).
It's important to know the difference between the subject and the direct object. The subject is the noun or pronoun in the sentence that does the verb (I, you, he, she, it, we, they). In this case, "coach" is the subject because the coach did the verb (the coach chose).
The direct object is the noun or pronoun that receives the verb (me, you, him, her, it, us, them). In this case, "us girls" and "him" are the direct objects because they are the ones the coach chose.