The General Principle That the Impact of a Teratogen Depends

The general principle that the impact of a teratogen depends upon the genotype of the organism is best illustrated by

A) rubella being more likely to cause birth defects during some times of pregnancy than during others.
B) thalidomide during pregnancy causing deformed limbs,but not low birth weight,while the use of marijuana during pregnancy is associated with low birth weight but not deformed limbs.
C) the effects of eating PCB-contaminated fish while pregnant not being obvious when a child is born,but appearing later in the child's life.
D) two women who both drank heavily during pregnancy with one of them giving birth to a child with fetal alcohol syndrome and the other giving birth to a normal,healthy child.