A Father and Mother Are Carriers of Phenylketonuria (PKU)

A father and mother are carriers of phenylketonuria (PKU) .Their 2-year-old daughter has PKU.The couple tells the nurse that they are planning to have a second baby.Because their daughter has PKU,they are sure that their next baby won't be affected.What information will the nurse use to formulate a response?

A) The odds of having another baby with PKU are very slim.
B) Each baby has a 50% chance of being affected.
C) Males are not affected by PKU.
D) The parents are both carriers so each baby has a 25% chance of being affected.