Briefing Aruba Knowledge

What is the best way to accomplish this?

A university has 2 departments. Department 1 has its own mobility domain with one controller. Department 2 has multiple controllers configured in a second
domain. The university is planning on offering a new application and needs users to be able to roam between both mobility domains.
What is the best way to accomplish this?

A.
The 2 existing domains should be left as they are. A 3rd mobility domain should then be created and all 3 controllers need to be added to it

B.
Merge the controllers into the same mobility domain

C.
The IP subnets of all controllers need to be configured to match

D.
This cannot be accomplished

E.
Create a new domain between a department 1 controller and one of the department 2 controllers