Since he entered puberty,DJ has been staying awake late at night,is often snacking at midnight,and has almost no energy in the morning.DJ's behavior:

A) means that he needs professional help.
B) means that he is trying to avoid his parents.
C) is due to changes in his brain.
D) is due to hormonal shifts.

The changes in DJ's behavior are likely due to hormonal shifts that occur during puberty. These shifts can affect a person's sleep patterns and appetite, leading to staying awake late at night and snacking at midnight. The lack of energy in the morning may also be a result of these hormonal changes. While professional help may eventually be necessary if DJ's behavior becomes severe or concerning, it is not necessarily the first step in addressing these changes. Avoiding his parents is not a likely explanation for DJ's behavior, as there is no information given to suggest this is the case. Finally, while changes in the brain do occur during puberty, they are not necessarily the primary cause of these specific behaviors.