A new release of a business-critical application is to be hosted in a customer’s home office
location. To reduce concerns regarding availability for the application, the customer will
deploy a second application instance into their Disaster Recovery (DR) location. If the home
office location becomes unavailable the DR location will take over hosting the application.
What is a mandatory requirement to allow take-over should disruption occur?

A.
Applications running in both locations

B.
Redundant WAN connections between both locations

C.
Clustered VIO Servers shadowed between both locations

D.
Hosted data must be synchronized between both locations