It depends on the type of drug you mean, such as medicinal drugs like marijuana, or bad drugs like cocaine or heroine. But the best answer(in my opinion) is B.
Because, when an infection exist in the human body it tends to spread, so if the cells stayed in one space then the infection would have a much greater opportunity to severly make that person very ill before the cells could even get to the infection.
Consuming alcohol while pregnant can cause all of these.
Drinking alcohol when pregnant can certainly cause an unborn to develop fetal alcohol syndrome (disabilities), have a low birth weight (weighs less than 5 pounds), and have a miscarriage (unborn dies in womb).
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