HSRP. Router 1 (master) and Router 2 (standby), same priority. When router 1 f0/1 (outside interface) down. With which tracking commands the Router 2 will be
able to preempt ? (Choose Two)

A.
Track 50

B.
Track 50 decrement 20

C.
ip tracking 50 interface f0/1 reachability

D.
ip tracking 50 Interface f0/1 ip routing (or line protocol)