The essence of Zhang Method is the "theory of psychological advantage". It believes in the great ______ students have once they develop the right interest, enthusiasm and motivation in learning a foreign language.

有关视网膜母细胞瘤描述正确的有（）

A.儿童常见

B.成人多见

C.多为单眼发生

D.有家族遗传史

E.易侵入颅内