A 16-year-old patient presents to the clinic for a scheduled immunization. The patient is not accompanied by an adult. The NP action is based on the knowledge that A. A minor must have the informed consent of a parent or guardian to receive the immunization B. The minimum age of consent is 21 years C. Consent is considered informed when the patient mental age is at least 12 years D. Consent is considered informed when the patient is at least 16 years old