Question

Insomnia is
a.
interruptions in breathing patterns during sleep.
b.
a lack of sleep.
c.
an inability to sleep, even if tired.
d.
the pattern of sleepiness and wakefulness.

Answer 1

trouble falling asleep or staying asleep

i would go with c
http://www.nhlbi.nih.gov/health/health-topics/topics/inso/

Answer 2

c. An inability to sleep, even if tired.

Answer 3

Anwser C.