What is calendar sharing?

A. a service that allows the creation of appointments and meetings
B. online storage consisting of calendar appointments
C. online sharing service that transfers appointment files
D. the process of updating calendars

C. online sharing service that transfers appointment files

Calendar sharing is the process of sharing calendar appointments, schedules, and events between individuals or groups through an online service. It allows users to view and update shared calendars, making it easier to coordinate and communicate about appointments and meetings.