Routers R1 and R2 use HSRP so that one router will back up the other should there be a failure.   Which two statements are true about the Hot Standby Router Protocol （HSRP）？ （）

• A、 Load sharing with HSRP is achieved by creating multiple subinterfaces on the HSRP routers.  
• B、 Routers configured for HSRP can belong to multiple groups and multiple VLANs.
• C、 Load sharing with HSRP is achieved by creating HSRP groups on the HSRP routers.
• D、 All routers configured for HSRP load balancing must be configured with the same priority.  
• E、 Routers configured for HSRP must belong to only one group per HSRP interface.