Why Is It Important to Warn a Patient Prescribed to Take

Why is it important to warn a patient prescribed to take finasteride (Proscar) for benign prostatic hyperplasia to wear a condom when having sex with a pregnant woman or one who could become pregnant?

A) The drug contains a hormone that can greatly increase the risk for having twins when absorbed by a pregnant woman.
B) The drug can be absorbed by the pregnant woman and cause birth defects in the fetus.
C) The drug reduces local immunity and increases the risk for transmitting HIV.
D) The drug increases the risk for vaginal infections in pregnant women.