The following command was issued on a router that is being configured as the active HSRP router
Standby ip 10.2.1.1
Which statement about this command is true?

A.
This command will not work because the HSRP groupinformation is missing

B.
The HSRP MAC address will be 0000.0c07.ac00

C.
The HSRP MAC address will be 0000.0c07.ac01

D.
The HSRP MAC address will be 0000.070c.ac11

E.
This command will not work because the active parameter is missing