The child has patient-controlled analgesia (PCA) of morphine with an 8-minute lockout. Teaching by the nurse has been effective if what behavior is seen in this child?
A. He pushes the button on the PCA whenever he wants.
B. He waits 8 minutes until pushing the button again.
C. The nurse pushes the PCA button whenever she is turning him.
D. The mother pushes the PCA button whenever the child moans or makes a strange face.