The parents of a child with cystic fibrosis discuss nutritional requirements and the need for vitamin supplements with the nurse. The nurse explains that it is necessary to give daily supplements of vitamins A, D, E, and K because:

D Children with cystic fibrosis have an increased excretion of water-soluble vitamins. A Children with cystic fibrosis require vitamin supplements because their metabolism is increased. B Children with cystic fibrosis do not eat a well-balanced diet. C Children with cystic fibrosis do not absorb fat-soluble vitamins.