Among the given sentences above, the sentence that shows a correct pronoun-antecedent agreement is, "Every recruit must spit shine his or her boots for inspection." The correct answer is option D. The antecedent in this sentence is "every recruit" (singular), and the pronouns used to refer back to the antecedent are "hers" and "his". We used two pronouns here because the antecedent refers to recruits of the same sexes.
