Brett continues to drink alcohol and smoke marijuana and tobacco during her pregnancy. Which statement is NOT true about the potential effect of these substances on her baby's development? A. Prenatal exposure to these substances can lead to fetal alcohol syndrome. B. These substances are unlikely to affect prenatal development because the placenta will prevent them from reaching the fetus. C. Prenatal exposure to these substances can predispose the fetus to psychological disorders later in life. D. These substances are considered teratogens that can interfere with prenatal development.