The answer is letter C.
Fetal alcohol syndrome is the most preventable pregnancy disease that mothers can do for their babies. Women who are abusing alcohol during the pregnancy can cause abnormalities to their developing child, it may lead to physical or mental disorders in the future when the baby is born to the world.
I'm not 100% certain because i know that doctors give folic acid to both a and b. However, I'm going to say C because the folic acid is putting a liner on your stomach so that when you do get pregnant there will be protection from certain medications. I hope this is the right answer for you.