Which Technique Can You Use to Detect Forwarding Path Failures

Multiple Choice

Which technique can you use to detect forwarding path failures at a uniform rate, and reconvergence times will be consistent and predictable when your routers are in the same broadcast domain?

A) Enable BFD on your routers.
B) Configure your routers with IP-SLA to ping the peer router.
C) Configure your routers with IP-SLA and track to ping the peer and switch to a default route if the pings fail.
D) Tune your routing protocol timers.