Most congenital birth defects are caused by
A)inherited traits.
B)lack of oxygen to the fetus.
C)viral infections during pregnancy.
D)unknown causes.
E)None of these choices is correct.

Question

Quizplus · Accepted Answer

The exact causes of most congenital birth defects are unknown. Some may have genetic or environmental factors, but many cases have no known cause. While factors like viral infections or oxygen deprivation can contribute to certain birth defects, they are not the primary causes of most congenital defects.

Most Congenital Birth Defects Are Caused by