You are a Storage administrator for Certkiller .com. A Certkiller .com User creates a temporary file that causes the free spade on a Volume to drop below a trigger value. You want to be alerted about the condition only if the free space stays low for several hours, not when it dips temporarily. How can you put this into practice using ControlCenter?

A.
Disable Severity level

B.
Disable Alert Definition

C.
Change the before settings

D.
Change severity thresholds