What should you set up to generate appointments at the top and bottom of the hour between 9:00 AM and 5:00 PM?

To generate appointments specifically at the top and bottom of the hour between 9:00 AM and 5:00 PM, setting up an "Interval" is essential. An interval allows you to define the frequency at which appointments are created. In this scenario, you want the appointments to either start on the hour or at the half-hour mark. By configuring the interval accordingly, you can ensure that appointments align precisely with these times within the specified office hours.

The other options, while potentially related to scheduling or resource management, do not directly enable the specific functionality needed to create appointments based solely on a set time pattern. Resource Requirements generally pertain to identifying the resources necessary for a job, Time Groups are useful for categorizing time slots but don’t specifically generate appointments, and Pools are typically used for managing resources for assignments and do not directly influence the scheduling of appointments at set times. Therefore, "Interval" is the most effective choice for achieving the desired scheduling outcome.