What Is the Most Appropriate Nursing Response to the Father

What is the most appropriate nursing response to the father of a newborn infant with myelomeningocele who asks about the cause of this condition?

A) "One of the parents carries a defective gene that causes myelomeningocele."
B) "A deficiency in folic acid in the father is the most likely cause."
C) "Offspring of parents who have a spinal abnormality are at greater risk for myelomeningocele."
D) "There may be no definitive cause identified."