How should you sleep to improve your posture?

AOn your back with a pillow under your body
BOn your stomach with your arms over your head
COn your back with your arms behind your head
DOn your side with your hips and knees slightly bent

Verified Answer :

The correct answer to this
question is:

a.
On your back with a pillow under your body.

It helps to put a pillow under your body to support your
back. This is one way of practicing to erecting your posture.

The answer is d On your side with hips and knees slightly bent.  The answer ! on back with pillow under body was WRONG