Which code segment should you insert at line 05?

You are developing a Windows Store app that uses Windows Push Notification Services (WNS). The app includes the following code:


The app must poll a notification service every 30 minutes and update the app tile with new content. You need to initiate polling.
Which code segment should you insert at line 05?


A. Option A
B. Option B
C. Option C
D. Option D

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