The group that needs the most sleep during a 24-hour cycle is
a. senior citizens
b. adults
c. adolescents
d. infants

The group that needs the most sleep is letter D. Infants need the most sleep of them all. Newborn babies need to sleep from roughly 14 to 17 hours per day. The older people get the less sleep they need to have. Old people need 7 to 8 hours of sleep. 

Ithink the answer is c.  hope this is right and

Trade schools would be the best option