How can administrator ensure that they can enforce this rule as they set up the WLAN in the Mobility Master (MM) Interface?

A company has a single Aruba Mobility Master (MM)-based solution with two Mobility Controllers (MCs). Network administrators want APs in building 1 to support a WLAN but do not want APs in building 2 to support the WLAN.

How can administrator ensure that they can enforce this rule as they set up the WLAN in the Mobility Master (MM) Interface?
A . Place APs in different buildings in different AP Groups.
B . Assign APs in different buildings to different MM nodes.
C . Configure APs in different buildings to use different frequency bands.
D . Assign different radio profiles to APs in different buildings.

Answer: A