Which three options describe how isolation can be achieved for VMDC data center security?

Which three options describe how isolation can be achieved for VMDC data center security? (Choose three.)
A. access control lists
B. intrusion prevention appliances that inspect traffic and detect security events on a per-VLAN basis
C. proper infrastructure hardening
D. role-based access and authentication
E. application redundancy
F. policy enforcement and access control
G. virtual routing and forwarding tables