What can scientists do now？查看材料A.Prescreen a baby"

What can scientists do now？查看材料

A.Prescreen a baby"s sex.

B.Screen babies for desirable attributes.

C.Insert genes that parents want.

D.Craft genes in a lab.

请帮忙给出正确答案和分析，谢谢！

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What can scientists do now？ 查看材料A.Prescreen a baby"