A Nurse Counsels a Couple on Sex-Linked Disorders

A nurse counsels a couple on sex-linked disorders. Both the man and the woman are carriers of the disorder. They ask the nurse how this disorder will affect any children they might have. The nurse's best response is:

A) "If you have a daughter, she will not be affected."
B) "Your son will be affected, since the father has the disorder."
C) "There is a 25% chance that your son will have the disorder, since the mother has the disorder."
D) "There is a 50% chance that your son will be a carrier only."