Your customer is deploying several small switch stacks around a city in a resilient ring. You decide
to implement topology groups to aid in VLAN management.

Which two statements are true? (Choose two.)

A.
Topology groups simplify the configuration of STP, MRP, VSRP, ERP, and 802.1W.

B.
Topology groups support VRRP.

C.
Existing VLAN information is lost when it is added to a topology group.

D.
Existing VLAN information is merged when it is added to a topology group.