You are developing a Windows Store app that invokes asynchronous methods to keep the app
responsive to user actions.
The app must handle exceptions gracefully, so they are never displayed to the user.
Which code segment should you use?

A.
Option A

B.
Option B

C.
Option C

D.
Option D

Explanation:
http://msdn.microsoft.com/en-us/library/hh156528.aspx
http://msdn.microsoft.com/en-us/library/dk1507sz.aspx