You are designing a Windows Phone 7 application that will send messages to update the application tile.
The Push Notification Service will send more than five hundred messages a day. You need to design the Push Notification Service to deliver all messages. What should you recommend?

A.
Set up a ShellTileSchedule object in the application.

B.
Set up a regular Push Notification Service on the server.

C.
Set up an authenticated Push Notification Service on the server.

D.
Set up a duplex service contract on the server for pushing messages to the phone.