A、Most of the evidence came from cross-sectional studies. B、Most of the evidence came from longitudinal studies. C、Most of the e

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问题

选项 A、Most of the evidence came from cross-sectional studies.
B、Most of the evidence came from longitudinal studies.
C、Most of the evidence was very persuasive.
D、Most of the evidence was unconvincing.

答案A

解析
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