Question 1: A, B, C, D

Question 2: A, B, C

Question 3: B, E

Question 4: A, B, C, D

Question 5: C, E

Question 6: A, D, E

Question 7: A, C, D

Question 8: B, D

Question 9: A, B, D, E

Question 10: C, D, E

Question 11: A, B, C, E

Question 12: B, C, D, E

Question 13: B, D, E

Question 14: A, B, E

Question 15: A, D

Question 16: A, C, D

Question 17: A, D, E

Question 18: B, C

Question 19: B

Question 20: C