Your company has a private cloud that is managed by using a System Center 2012 infrastructure.
You deploy an application visualization solution.
You deploy a server named Server1, and then you install the Remote Desktop Services server role.
Server1 is monitored by using Operations Manager.
You deploy a virtualized application named App1 to Server1.
You need to set the state of Server1 to critical if CPU utilization by App1 exceeds 80 percent for five minutes.
What should you create?

A.
a rule

B.
a monitor

C.
a service level objective (SLO)

D.
an event subscription

E.
a synthetic transaction

Explanation:
“You need to set the state of Server1 to critical if CPU utilization by App1 exceeds 80 percent for five minutes.”
SLOs don’t change the state of an object, monitors do:
Create a monitor if…
You want to affect the health of an object. In addition to generating an alert, a monitor will affect the health state
of its target object. This is displayed in state views and availability reports.
Monitors and Rules
http://technet.microsoft.com/en-us/library/hh457603.aspx