Question 1: A, B, C

Question 2: A, B, C

Question 3: A, B, C, E

Question 4: B, C, D

Question 5: B, C

Question 6: C, D

Question 7: C, D, E

Question 8: B, D, E

Question 9: A, C, D, E

Question 10: A, B, C, E

Question 11: B, C, D, E

Question 12: A, B, D, E

Question 13: A, B, D, E

Question 14: E

Question 15: D

Question 16: E

Question 17: C

Question 18: D

Question 19: B

Question 20: D