Which option must be set before you can trigger alarms when traffic reaches a specified threshold?

Which option must be set before you can trigger alarms when traffic reaches a specified threshold?

A.
Logging

B.
Counters

C.
Schedule

D.
Authentication

E.
Address translation

Explanation:
You can set a threshold that triggers an alarm when the traffic permitted by the policy exceeds a specified number of bytes per second, bytes per minute, or both. Because the traffic alarm requires the NetScreen device to monitor the total number of bytes, you must also enable the counting feature.