单选题What is the functionality of redundant interfaces （reth） in a chassis cluster？（）A reth interfaces are used only for VRRP.B reth interfaces are the same as physical interfaces.C reth interfaces are pseudo-interfaces that are considered the parent interf

reth interfaces are used only for VRRP.

reth interfaces are the same as physical interfaces.

reth interfaces are pseudo-interfaces that are considered the parent interface for two physical interfaces.

Each cluster member has a reth interface that can be used to share session state information with the other cluster members.