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

Explanation:
The Cisco Global Site Selector (GSS) is a GSLB DNS appliance. The GSS is a part of the Cisco ACE family of load-balancers. As an ACE family member, the GSS
has the ability to closely monitor Cisco load-balancers via the KAL-AP (keepalive appliance protocol).
packetpushers.net/quick-overview-cisco-gss-4492r-global-site-selector-gslb-dns-appliance/