Which of the following best describes a benefit of appointment reminders for a medical office?

Appointment reminders significantly enhance patient compliance, which is a crucial benefit for a medical office. When patients receive reminders about their scheduled appointments, they are more likely to remember and attend these appointments. This increased compliance helps to minimize no-shows, which can disrupt the scheduling flow and impact the office's efficiency and revenue. By ensuring that patients attend their appointments, healthcare providers can deliver timely care, maintain better patient health outcomes, and optimize their operational effectiveness.

The other options, while potentially relevant in different contexts, do not accurately reflect the primary benefit of appointment reminders. They do not reduce appointment times, eliminate patient fees, or increase office space, which are not direct results of sending reminders. Thus, the focus on compliance showcases how reminders are an essential tool for improving patient engagement and the overall functioning of a medical office.