Some Functionalities Require Integration Between the PHR and a Scheduling

Some functionalities require integration between the PHR and a scheduling application. Which of the following is a benefit of this communication?

A) Integration between a scheduling application and the PHR allows the patient to locate a physician's practice in a new region.
B) Integration between a scheduling application and the PHR allows the patient to have instant access with a health care provider's staff.
C) Integration between a scheduling application and the PHR allows the patient to schedule an appointment without making a telephone call.
D) Integration between a scheduling application and the PHR allows the patient to send notes and updates to the health care provider's office.