What are two characteristics of Cisco Global Site Selector? (Choose two.)

A.
It helps verify end-to-end path availability.

B.
It provides traffic rerouting in case of disaster.

C.
HSRP, GLBP, and VRRP can be clients of GSS.

D.
BGP must be the routing protocol between the distributed data centers.

E.
DNS responsiveness is improved by providing centralized domain management.