B.They / believe that / nerves in the left side / of the brain / develop faster / in girls than / in boys.
C.They believe that nerves / in the left side of the brain develop faster in girls / than in boys.
D.他们认为,在大脑左侧的神经,女孩发展得更快比男孩。
E.他们认为,女孩大脑左半部的神经比男孩的发育得更快。
F.他们认为那个神经在左边的脑子发展更快在女孩比在男孩。