What Is the Best Response by the Nurse to a Mother

What is the best response by the nurse to a mother asking about the cause of her infant's bilateral cleft lip?

A) "Did you use alcohol during your pregnancy?"
B) "Does anyone in your family have a cleft lip or palate?"
C) "This defect is associated with intrauterine infection during the second trimester."
D) "The prevalent of cleft lip is higher in Caucasians."