A. Call the Start method of the ManagementEventWatcher to
start listening for events.
B. To configure a listener for events, use the EventArrived
event of the
ManagementEventWatcher.
C. To wait for the events, use the WaitFor NextEvent method
of the
ManagementEventWatcher.
D. Create an event handler class that contains a method
which receives an
ObjectReadyEventArgs parameter.
E. Use the Stopped event of the ManagementEventWatcher to
configure a listener for
events.

Answer: A,B

Explanation: The ManagementEventWatcher will not start to
listen (hence the app
cannot respond to Async messages) until the start method is
called. Once the
ManagementEventWatcher is listening it will trigger an
EventArrived event every
time an event occurs that matches the query. You should
provide a listener for the
EventArrived event to perform any custom handling.
WaitForNextEvent method is synchronous i.e the current
thread will wait until a
matching event occurs
ObjectReadyEventArgs holds data for the ObjectReadyEvent.
The Stopped event is triggered when the
ManagmentEventWatcher cancels it's
subscription i.e is no longer interested in receiving
notification of events.