Who Among the Following Is Most Likely to Be Suffering

Who among the following is most likely to be suffering from sleep apnea?

A) Nia, who occasionally wakes up from sleep gasping for breath due to a temporary suspension of breathing
B) Sam, who sometimes walks around while still asleep without being consciously aware of doing so
C) Beth, who has difficulty falling asleep, wakes up quite often during the night, and has trouble going back to sleep
D) Mike, who consistently feels drowsy all day and tends to sleep a lot