Both People in a Married Couple Carry the Recessive Gene

Both people in a married couple carry the recessive gene for cystic fibrosis. When asked about the incidence of any children developing the disorder, what should the nurse respond?

A) "There is no chance."
B) "There is a 1 in 4 chance."
C) "There is a 2 in 4 chance."
D) "There is a 3 in 4 chance."