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Question
It is difficult to isolate the precise damage caused by illegal drug use during pregnancy because
A)most drug-using mothers refuse to participate in teratology research.
B)the majority of babies born to drug-using mothers do not survive for more than a few days.
C)most drug-using mothers quit during the first trimester of pregnancy.
D)users often take several drugs, display other high-risk behaviors, and suffer from poverty and other stresses.
Answer
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