Choose the underlined part among A, B, C or D that needs correcting. She was sad after she reads her boyfriend’s letter

Choose the underlined part among A, B, C or D that needs correcting.
14. She was sad after she reads her boyfriend’s letter.
A B C D
15. After she had had lunch, she had taken a nap.
A B C D
16. (A) Her brother is (B) interested in (C) to join the (D) English Club.
17. We know that (A) there is (B) no point in (C) help the pupils (D) at the present.
18. (A) Would you be (B) enough kind (C) to open the doors (D) please?
19. "I think we (A) should depart at ten." "(B) Where?" "I (C) said I think we (D) should go at ten."
20. Mr. Nguyen (A) was just getting (B) into the bath (C) what the cell phone (D) rang.