Which configuration command can you apply to a hsrp router so that its local interface becomes active if all other routers in the group fail?

Which configuration command can you apply to a hsrp router so that its local interface becomes active if all other routers in the group fail?
A . no additional config is required
B . standby 1 track ethernet
C . standby 1 preempt
D . standby 1 priority 250

Answer: A