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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Our brains could be hard-wired to be male or female long before we begin to grow testes(丸)or ovaries(卵巢)in the womb. This discovery might explain why some people feel trapped in a body that’s the wron...
A.
continue to study the influence of genes on human brain sexuality
B.
look for more dominant genes for males as well as for females
C.
continue their study about genes on mice
D.
show that there are differences in expression of genes of males and females