Which first-hop router redundancy protocol uses the active virtual gateway to assign a virtual MAC address to the active virtual forwarders?

Which first-hop router redundancy protocol uses the active virtual gateway to assign a virtual MAC
address to the active virtual forwarders?

A.
HSRP

B.
VRRP

C.
GLBP

D.
FHRP

Explanation:
http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html