Ryan, a 2-week-
old baby, is asleep in his crib. His mother notices that he is having irregular breathing and opens his eyes during his sleep. He is showing somewhat active movements and sometimes smiles during his sleep. He sucks breast milk with his eyes closed and gets startled with the slightest noise. Which of the following states of arousal is Ryan most likely in?
a. waking activity
b. regular sleep
c. drowsiness
d. alert inactivity