Final answer:
It is true that a client should remain in a supine position for at least 5 minutes after receiving a rectal suppository to aid in medication absorption.
Step-by-step explanation:
The statement "The client should remain supine for 5 minutes after having received a rectal suppository." is true. After administering a rectal suppository, it is generally recommended for the client to stay in a lying position, specifically the supine position (lying on the back), to ensure proper absorption of the medication. The time frame can vary based on the healthcare provider's instructions or the medication's specifics, but 5 minutes is often suggested as a minimum to allow the suppository to dissolve and facilitate the absorption of the drug into the body.