You are developing a Windows Store app. The app will receive push notifications from the Windows Push Notification Services (WNS).
You store the secret for authentication in a variable named encodedSecret. You store the security ID for authentication in a variable named encdedSid.
Both variables contain string data encoded for use in a Uniform Resource Identifier (URI).
You create a WebClient object named client.
You need to use the client object to retrieve an OAuth token as a string and to store the string in a variable named response.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
