NREM sleep is a period of sleep . associated with lucid dreaming outside periods of REM sleep that always occurs immediately after REM sleep that overlaps REM sleep

outside periods of REM sleep  

Explanation:

Briefly, sleep is divided into REM and NREM phases.

The NREM phase occurs first and is an outside periods of REM sleep phase.

It is characterized as a very important phase because for the full development of the body, this is because it is there that the release of growth hormones and the recovery of physical energy during the day occurs. The body achieves deep rest to the point of decreasing neural activity.

the answer might be either a or c. can't be too sure , because i searched the web, but no valid answers came through.

yes i would go with c

hope i

-lavira: )