An engineer must configure HSRP group 300 on a Cisco IOS router. When the router is functional, it must be the active HSRP router. The peer router has been configured using the default priority value. Which command set is required?

A.	standby version 2 standby 300 priority 110 standby 300 preempt
B.	standby 300 priority 110 standby 300 timers 1 110
C.	standby version 2 standby 300 priority 90 standby 300 preempt
D.	standby 300 priority 90 standby 300 preempt