Tom’s first school only had eight pupils and he was the star, but when he got to a high-school of eight hundred students, he was

Tom’s first school only had eight pupils and he was the star, but when he got to a high-school of eight hundred students, he was.

A. a big fish in a small pond

B.a little fish in a big pond

C. a big fish in a big pond

D.a little fish in a small pond

正确答案：a little fish in a big pond