Before administering a medication to a client, the nurse must identify the client. Which of the following methods of identification should the nurse use?

The correct answer is C: Ask the client's full name and date of birth. This method ensures accurate identification by directly confirming the client's identity with the client themselves, reducing the risk of error. Asking a family member (A) may lead to confusion or misinformation. Checking the client's name on the MAR (B) is helpful but may not be sufficient for proper identification. Verifying the client's room number (D) is not a reliable method as clients can be moved or share rooms. The best practice is to directly confirm the client's identity using their full name and date of birth (C) to ensure safe and accurate medication administration.