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