Refer to the exhibit.



⠀⠀R1⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀R2

Interface Fa0/0
IP address 172.30.110.2
standby 1 ip 172.30.110.1


Interface Fa0/0
IP address 172.30.110.3
standby 1 ip 172.30.110.1



Which configuration change ensures that R1 is the active gateway whenever it is in a functional state for the 172.30.110.0/24 network?

A.	R2 standby 1 priority 90 standby 1 preempt
B.	R2 standby 1 priority 100 standby 1 preempt
C.	⠀R1⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀R2 standby 1 preempt standby 1 priority 90
D.	⠀R1⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀R2 standby 1 preempt standby 1 priority 100