The mother of a 3-month-old breastfed infant asks about giving her baby water since it is summer and very warm. The nurse should recommend that:
a. fluids in addition to breast milk are not needed.
b. water should be given if the infant seems to nurse longer than usual.
c. water once or twice a day will make up for losses caused by environmental temperature.
d. clear juices would be better than water to promote adequate fluid intake.