Refer to the exhibit. 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 standby 1 preempt R2 standby 1 priority 90
D. R1 standby 1 preempt R2 standby 1 priority 100
Correct Answer: C