An NSX administrator wants to create a Tier-0 Gateway to support equal cost multi-path (ECMP) routing. Which failover detection protocol must be used to meet this requirement? 

Answer options:

A. Host Standby Router Protocol (HSRP)
B. Beacon Probing (BP)
C. Virtual Router Redundancy Protocol (VRRP)
D. Bidirectional Forwarding Detection (BFD)

D