U1981 double machine standby networking scenario, the default configuration, if the primary node fails, resulting in heartbeat interrupted with the standby node more than ( ) minutes, the master node becomes inactive, standby node becomes active.

U1981 double machine standby networking scenario, the default configuration, if the primary node fails, resulting in heartbeat interrupted with the standby node more than ( ) minutes, the master node becomes inactive, standby node becomes active.
A . 3 minutes
B . 5 minutes
C . 1 minute
D . 2 minutes

Answer: D