Refer to the exhibit.

A customer needs to upgrade the wireless network at their campus, which has a single large building.
Employees use the wireless network to access the Internet and centralized services. The building has four floors.
These are the requirements: 30 APs on each floor
A Mobility Master (MM)-based architecture Deployment of one Aruba 7030 Mobility Controller (MC) on each floor, with the MCs combined in a cluster for seamless client failover and roaming

What should the architect explain to the customer about the proposed solution?