A Woman Who Has Just Discovered That She Is Pregnant

A woman who has just discovered that she is pregnant is in the clinic for her first obstetric visit.She asks the nurse,"How many drinks a day is safe for my baby?" The nurse's best response is:

A) "You should limit your drinking to once or twice a week."
B) "It's okay to have up to two glasses of wine a day."
C) "As long as you avoid getting drunk, you should be safe."
D) "No amount of alcohol has been determined to be safe during pregnancy."