Belinda wants to get a flu shot this year and is deciding where to get her vaccination. She remembers that a few months ago she had a very sore throat on a Saturday when her primary doctor was not available, so she went to a different medical office where a nurse practitioner could diagnose and treat her. Based on this experience, even though her doctor can give her a flu shot today, she opts to go back to the office where she saw the nurse practitioner. Belinda has chosen