답은 다음과 같습니다
1, C 2, ABCD 3, BCD 4, CD 5, ABCD 6, ABCD 7, B 8, AC 9, ACD
10, ABCD 1 1, ACD 12, D 13, D.
18, A 19, ABCD 20, D 2 1, A 22, A 23, A 24, A 25, A 26, 입니다
28, A 29, A 30, b