Which statement accurately describes a calling search space?

A.
a group of object with similar reach ability characteristics.

B.
a calling feature that finds mobile users.

C.
a toll that is used to track calls to certain numbers.

D.
a feature that defines which partitions are reachable from a device.

Explanation:
http://www.techrecipes.com/rx/703/cisco_callmanager_partition_and_calling_search_spaces_css_explained/