Blair has trouble turning off his mind at night, which usually results in hours of lying awake in bed. It doesn't help that his wife, Kim, has a sleep condition that sometimes causes her to stop breathing in her sleep and catch her breath in loud gasps. Blair is troubled by __________, while Kim suffers from __________.
a. insomnia; obstructive sleep apnea
b. obstructive sleep apnea; somnambulism
c. insomnia; narcolepsy
d. obstructive sleep apnea; REM behavior disorder