When His Sister Becomes Pregnant,Graham Gives Her a "Mini-Lesson" in Prenatal

When his sister becomes pregnant,Graham gives her a "mini-lesson" in prenatal care based on what he learned in his introductory psychology class.He should tell her all of the following EXCEPT

A) teratogens include any chemical in the environment that negatively affects the fetus.
B) teratogens work on recessive genes to affect prenatal child development.
C) alcohol, prescription drugs, and chemicals in the environment are teratogens.
D) she can avoid many birth defects by practicing healthy habits.