What Does Evidence on the Effects of Alcohol Consumption During

What does evidence on the effects of alcohol consumption during pregnancy strongly suggest?

A) Although alcohol can be harmful to the developing fetus, moderate drinking may help lower the mother's blood pressure during the pregnancy; therefore, it prescribed in some circumstances.
B) Only the children of chronic alcoholics will suffer long-term effects.
C) The effects of prenatal exposure to alcohol are clearly dose-related, but there is no known safe level of consumption.
D) Social drinking poses no threat to the developing fetus, and mothers should just relax and enjoy as desired.