You are developing a Windows Store app that targets customers who travel frequently.
The app allows users to record audio and video files and save them to their local devices.
You have the following traveler-friendly requirements:
The audio and video files must be shorter than three minutes in duration.
The app must finalize recording automatically when the time limit is reached.
You cannot use continuous polling to test when the time limit is reached.
You need to ensure that the app meets the requirements.
What should you do?

A.
Assign a handler to the DefaultAudioCaptureDeviceChanged event to handle the requirements.

B.
Handle the RecordLimitationExceeded event to handle the requirements.

C.
Call the StopRecordAsync() method to end recording.

D.
Handle the AudioTransferRequested event to avoid continuous polling.

Explanation:
http://msdn.microsoft.com/enus/library/windows/apps/windows.media.capture.mediacapture.recordlimitationexceeded.aspx