The two routers are connected through the LAN to form a VRRP backup group. The VRRP timer configuration on each interface is as follows:

The two routers are connected through the LAN to form a VRRP backup group. The VRRP timer configuration on each interface is as follows:

[RTA-GigabitEthernet1/0]vrrp vrid 1 timer advertise 5

[RTB-GigabitEthernet1/0]vrrp vrid 1 timer advertise 5

VRRP backup group 1 is operating normally, RTA is the Master and RTB is the Backup. If the router RTA fails after the device runs for a period of time, the time for the router RTB to change from Backup to Master may be
A . 3 seconds
B . 5 seconds
C . 12 seconds
D . 20 seconds

Answer: C