A nurse is preparing to administer medication to a client who has a new prescription. Which of the following actions should the nurse take first?

A. Calculate the correct amount of the medication: This is an important step but should be done after confirming the client's identity to ensure medication safety. B. Validate the prescription with the available medication: Validating the prescription is essential, but client identification should be the priority before administering the medication. C. Document the time of the medication administration: Documentation is done after the medication is administered, and client identification must come first. D. Identify the client using two means of identification: This is the most critical first step to ensure the correct patient is receiving the correct medication.