About the menisci，which is right？

A.The medial meniscus is large and has a "C" shape

B.The lateral meniscus is smaller and has an "O" shape

C.Easy to be injured

D.It’s part of the knee joint

正确答案：The medial meniscus is large and has a "C" shape；The lateral meniscus is smaller and has an "O" shape；Easy to be injured；It’s part of the knee joint