A nurse is reinforcing teaching with a parent of a 4-month-old infant during a home visit.
Which of the following statements by the parent indicates an understanding of the teaching?
a. "I will leave the plastic covering on the crib mattress. "
b. "I will use a cool mist vaporizer in my baby's room. "
c. "I will leave my baby's crib while he is sleeping. "
d. "I will lay my baby's head on a pillow while he is in the crib. "