What are the two primary use cases of VMware vCloud Availability for vCloud Director solution set? (Choose two.)
A. orchestrate VMware Fault Tolerance for a vApp in a vCloud Director environment
B. create an L2 VPN tunnel between on-premises vCenter and a vCloud Director environment
C. activate self-service Disaster Recovery between vCloud Director environments
D. automate creation of vCloud Director cells for high availability purposes
E. provide Disaster Recovery between on-premises vCenter to a vCloud Director environment