In order to develop good sleep hygiene, one should strive to do all of the following except a. exercise right before bedb. avoid caffeine before bedtimec. avoid food at least an hour before sleepd. establish a sleep-friendly environment 

A.

exercise right before bed

A. exercise right before bed

Explanation:

Good sleep hygiene can be define as the practices which can help an individual comfortably and appreciably for standard duration. Thus improves health.  

An exercise should be avoided before sleep. This is because of the fact that the exercise will produce tension and pain the muscles and bones. The pain may disturb the body and as a result of this the person may not be able to sleep.