Quincy Is Four Years Old,and He Has Mental Retardation and a Slightly

Multiple Choice

Quincy is four years old,and he has mental retardation and a slightly misshapen face.What most likely happened during Quincy's prenatal development?

A) He was exposed to a teratogen.
B) His mother experienced severe stress.
C) His mother did not take in enough vitamin B.
D) He skipped the embryonic period.