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) "Do you know of anyone in your family or the baby's father's family who was born with cleft lip or palate problems?"
C) "This defect is associated with intrauterine infection during the second trimester."
D) "The prevalent of cleft lip is higher in Caucasians"