It was once believed ________， and thus we can tell how successful he／she will be in the

It was once believed ________， and thus we can tell how successful he/she will be in the future according to his/her intelligence. 查看材料

A.born to be more intelligent or less intelligent

B.have a better chance to develop his intelligence

C.taught to be more intelligent

D.that intelligence was something， a baby was born with

E.and because of the lack of communication with his classmates

F.and partly has to do with a child"s living environment

请帮忙给出正确答案和分析，谢谢！