The Basic Rule That Governs the Effects of Teratogens Is

The basic rule that governs the effects of teratogens is that

A) the more teratogens present, the more likely it is that prenatal development will be adversely affected.
B) the larger the molecule (virus, chemical, etc.) , the greater the risk of a harmful effect by the teratogen.
C) the further the pregnancy has advanced, the greater the risk for defects or malformations.
D) an organ system is most vulnerable to disruption during the time when it is developing rapidly.