You are developing a Windows Store app.
You need to ensure that the app can run only if the device is located in a specified location. If the
device is moved from the location while the app is running, the app must be disabled.
What should you use? (More than one answer choice may achieve the goal. Select the BEST answer.)

A.
the Networklnfomation.GetlnternetConnectionProfileQ method in the OnLaunched event handler

B.
the GeoLocator.PositionChanged event handler

C.
the GeofenceMonitor.GeofenceStateChanged event handler

D.
the GeoLocator.GetGeopositionAsync() method in the OnLaunched event handler

Explanation:
http://msdn.microsoft.com/enus/library/windows/apps/windows.devices.geolocation.geofencing.geofencemonitor.geofencestatec
hanged.aspx