Which three statements about HSRP operation are true?（）

• A、The virtual IP address and virtual MA+K44C address are active on the HSRP Master router.
• B、The HSRP default timers are a 3 second hello interval and a 10 second dead interval.
• C、HSRP supports only clear-text authentication.
• D、The HSRP virtual IP address must be on a different subnet than the routers' interfaces on the same LAN.
• E、The HSRP virtual IP address must be the same as one of the router's interface addresses on the LAN.
• F、HSRP supports up to 255 groups per interface, enabling an administrative form of load balancing.