What is the reason for this behavior?

You are the Security Administrator for MegaCorp and would like to view network activity using
SmartReporter. You select a standard predefined report. As you can see here, you can select the
london Gateway.
When you attempt to configure the Express Report, you are unable to select this Gateway.
What is the reason for this behavior? Give the BEST answer.

A.
You must enable the Eventia Express Mode on the london Gateway.
B. You have the license for Eventia Reporter in Standard mode only.

C.
You must enable the Express Mode inside Eventia Reporter.

D.
You must enable Monitoring in the london Gateway object’s General Properties.