Question

Who is making so much noise in the garden? __ the children. A. It is B. They are C. It can't be

D.there are
我看到你回答过这个题。我和他唯一的区别就是C选项不一样。书上给我的答案是A。可是我不明白是为什么

Answer 1

一般来说用 who 提问用单数回答，回答要和提问一致,it 是和 who 呼应，并不和 children 呼应.
补充： 实际全句是 it is the children who are making so much noise.

Answer 2

it is the children who are making so much noise.，强调句