An architect plans 128 APs to support 12,800 devices in a very high density (VHD) design. The customer requires high availability, so the architect plans to recommend a pair of controllers. What is one reason to recommend 7210 controllers rather than 7205 controllers for this deployment?
A. the need for high speed 10 GbE ports
B. the need for clustering
C. the number of devise required
D. the number of APs required