Which plan meets the customer requirements?

An architect proposes an Aruba solution with a hardware Mobility Master (MM) to a customer. The customer has a disaster recovery site which is connected to the main site at Layer 3. The customer requires the MM to remain available in case of a total site failure.

Which plan meets the customer requirements?
A . Deploy a hardware MM to the disaster recovery site and set up VRRP between them.
B . Deploy a hardware MM to the disaster recovery site and set its IP address as the standby master for MCs.
C . Deploy the virtual MM (VMM) to the disaster recovery site and set the VMM IP address to the same address as the hardware M
E . Deploy the virtual MM (VMM) to the disaster recovery site and configure clustering on the hardware and software appliances.

Answer: A