Arthur is a scientist who works for a large drug company exploring ways to prevent Down syndrome in developing fetuses. He decides that the most effective way to reduce rates of this disorder is to develop a drug that slows aging in women planning to become pregnant. Is this approach likely to be effective?
A. No, because this will not change the amount of harmful environmental influences the woman is exposed to over her lifetime.
B. No, because Down syndrome is primarily caused by an error in the male's sperm and not the woman's egg.
C. Yes, because Down syndrome does not affect the fetuses of women who become pregnant before age 25.
D. Yes, because reducing maternal age will guarantee that no genetic abnormalities will affect the developing fetus.
Answer: A
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