单选题：Whatisskepticalobservers'opiniononancestrytesting?

题目分类：英语四级
题目类型：单选题
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题目内容：

Whatisskepticalobservers'opiniononancestrytesting? A．Itfailstotracedistantancestors.
B．Itrebuildsreliablebloodlines.
C．Itcontainsfullygeneticinformation.
D．Itfailstoachievetheclaimedaccuracy.

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