Which command would be used to perform the manual RE switchover?

You received an alert from your monitoring system that the master Routing Engine (RE) on an EX4300 switch in a virtual chassis has hardware issues and might need to be replaced. Because the switch already had graceful Routing Engine switchover (GRES) enabled and configured, you must perform a manual switchover to the backup RE to avoid disruption.

Which command would be used to perform the manual RE switchover?
A . Log in to the backup RE and issue the request chassis-control operation command.
B . Log in to the backup RE and issue the request chassis routing-engine master switch operation command.
C . Log in to the backup RE and issue the request chassis routing-engine master acquire operation command.
D . Log in to the backup RE and issue the request iccp-service operation command.

Answer: B