In experiments, participants averaged 12 or more hours of sleep a day for the first few days of unrestricted sleep. they then settled back to 7.5 to 9 hours of sleep a day. the unusually lengthy sleep time of the first few days suggests that participants began these experiments with
a) a sleep debt.
b) narcolepsy.
c) sleep apnea.
d) low melatonin levels.

a sleep debt.                        

Explanation:

Sleep debt is also known as a sleep deficit. It is the intensifying effect of not getting proper or enough sleep. A huge sleep debt can even lead to physical or mental fatigue. There are two types of sleep debt which include the results of total and partial sleep deprivation. According to a study, it takes almost four days to recover completely from the loss of one hour's sleep. Most adults sleep for only six hours each night.

the first part is ocean

explanation:

the correct answer is option c. elenita versus "early puerto rican decor" is the best example, out of all the options, of a cultural conflict. a cultural conflict is defined as what happens when different cultures, that have different values and believes, clash. elenita not liking or accepting the puerto rican style of decoration, would represent that she does not identify herself with the puerto rican culture, therefore does not want to have decorations influenced by that culture.