I'm interested ___the changes ___the fish's colour.A.in; on,B.in;in,C.at；in,D.at; for

I'm interested ___the changes ___the fish's colour.A.in; on,B.in;in,C.at；in,D.at; for
I'm interested ___the changes ___the fish's colour.A.in; on,B.in;in,C.at；in,D.at; for

I'm interested ___the changes ___the fish's colour.A.in; on,B.in;in,C.at；in,D.at; for
答案是in on 不过on 也可以换成of 谢谢你对我的信任!

I'm interested _in__the changes _of__the fish's colour.

A