Talia Took the Drug Thalidomide While Pregnant in 1958

Talia took the drug Thalidomide while pregnant in 1958. The probability that her infant will suffer deformities because of exposure to this drug would depend on which factor?

A) Whether the mother is allergic to the drug
B) Whether the mother took a liquid or pill form of the drug
C) Whether the mother took the brand name version of the drug or a generic version
D) Whether the mother took the drug during the period that exposes the fetus to harm
E) Whether the mother took the drug under supervision of a physician