VRRP backup group 1 runs normally, RTA is the Master, and RTB is the Backup. If the device runs for a period of time and router RTA fails, the time for router RTB to change from Backup to Master may be?

Two routers are connected together through a LAN to form a VRRP backup group. The VRRP timer is configured on each interface as follows:

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

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

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

Answer: C