题目内容
（请给出正确答案）
[主观题]
What is the main purpose of the passage？ A.To outline the research findings on the bra
What is the main purpose of the passage？
A.To outline the research findings on the brain structure.
B.To explain the link between sex and brain structure.
C.To discuss the various factors that cause brain differences.
D.To suggest new areas in brain research.
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