The passage mainly discusses ______. The author would most likely agree with which of the following statements?

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问题 The passage mainly discusses ______.
The author would most likely agree with which of the following statements?

选项 A、Human cloning is a technical impossibility.
B、Human cloning may cause ethical concerns.
C、Cloning contributes to understanding of stem ceils.
D、The potential medical values of cloning have been exaggerated.

答案B

解析
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