The correct answer is "D. Cover letters should explain the applicant's future intentions and goals".
Explanation:
Cover letters are responsible for presenting and introducing the applicant and his/her aims to the institution or company in order to draw a better idea of what the person is intended to. "Cover letters should explain the applicant's future intentions and goals" because the evaluator is going to assess him/her according to what the person said and aims at doing with work and/or studying.
