Your company has a private cloud that is managed by using a System Center 2012 infrastructure.
You have a web application named WebApp1 that is hosted in another datacenter.
The datacenter is not part of the private cloud.
You need to ensure that Service Manager incidents are generated automatically when WebApp1 is unavailable.
What should you create?

A.
a Service Level Tracking object

B.
an event rule

C.
a synthetic transaction

D.
a service offering