Which three statements are true of a default HSRP configuration? (Choose three.)

A.
The Standby hello time is 2 seconds.

B.
Two HSRP groups are configured.

C.
The Standby track interface priority decrement is 10.

D.
The Standby hold time is 10 seconds

E.
The Standby priority is 100.

F.
The Standby delay is 3 seconds.

Explanation:

HSRP uses a priority scheme to determine which HSRP-configured router is to be the default active router. To configure a router as the active router, you assign it a priority that is higher than the priority of all the other HSRP-configured routers. The default priority is 100, so if you configure just one router to have a higher priority, that router will be the default active router.
For both HSRP and MHSRP, you can use the tracking feature to adjust the Hot Standby priority of a router based on whether certain of the router’s interfaces are available. When a tracked interface becomes unavailable, the HSRP priority of the router is decreased. The default decrement value is 10.
The
standby timers interface configuration command sets the interval in seconds between hello messages (called the hello time) to five seconds and sets the duration in seconds that a router waits before it declares the active router to be down (called the hold time) to eight seconds. (The defaults are three and 10 seconds, respectively.) If you decide to modify the default values, you must configure each router to use the same hello time and hold time.
Reference: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ics/cs009.htm#wp3475