Hot Standby Router Protocol (HSRP) is able to provide network redundancy for IP networks. Concerning HSRP load sharing, which two descriptions make sense?（）

A. It is achieved by using more than one HSRP group.
B. It is done in regards to either round robin or weight basis.
C. It is used to offload the active router in a certain HSRP group.
D. The return traffic is influenced by HSRP load sharing configuration.
E. Single group HSRP is used to achieve more efficient link utilization.