单项选择题
A.at birth B.through education C.both at birth and through education D.neither at birth nor through education
A.the importance of their intelligence B.the role of environment on intelligence C.the importance of their positions D.the part that birth plays
A.never become a genius B.still become a genius if he should be given special education C.exceed his intelligence limits in rich surroundings D.not reach his intelligence in his life