—Which subject is , Chinese or maths?—I think maths is. A. difficultB. more difficult C. m

—Which subject is , Chinese or maths?
—I think maths is.
A. difficult
B. more difficult
C. most difficult
D. the most difficult

A. difficult(答案→)B. more difficult C. most difficultD. the most difficult解析：句意:-哪门科目更难，语文还是数学？-我想是数学。根据句意可知，这里表示语文和数学两门科目相比，哪个更难，故应该用形容词的比较级形式，difficult 的比较级应该在其前面加more。A选项是原级，不符合句意；C、D是最高级，表示三者或以上相比。故选B。

就是这个解释