Which command, when issued on the primary adaptive security appliance, will reactivate the primary adaptive security appliance and restore it to active status?

The primary adaptive security appliance in an active/standby failover configuration failed, so the secondary adaptive security appliance was automatically activateD. The network administrator then fixed the problem.

Now the administrator wants to return the primary to active status. Which command, when issued on the primary adaptive security appliance, will reactivate the primary adaptive security appliance and restore it to active status?

A.
failover primary active

B.
no failover active

C.
failover active

D.
failover reset

E.
failover exec standby