Final answer:
A patient's profile should be updated every 6 months to ensure that the information in the profile is accurate and up-to-date.
Step-by-step explanation:
The correct answer is c. every 6 months. A patient's profile should be updated every 6 months to ensure that the information in the profile is accurate and up-to-date. This regular updating allows healthcare professionals to provide the best possible care to patients. During these updates, any changes in the patient's information such as medical conditions, allergies, or medications can be documented.