What is the relationship between partition, time schedule, and time period in Time-of-Day routing in Cisco Unified Communications Manager?

What is the relationship between partition, time schedule, and time period in Time-of-Day routing in Cisco Unified Communications Manager?
A. A partition can have multiple time schedules assigned. A time schedule contains one or more time periods.
B. A partition can have one time schedule assigned. A time schedule contains one or more time periods.
C. A partition can have multiple time schedules assigned. A time schedule contains only one time period.
D. A partition can have one time schedule assigned. A time schedule contains only one time period.