You are designing a Windows Phone 7 application that depends on having a network connection. The network connection occasionally becomes unavailable. The application must not poll to see if a network connection is available. Application data must be available when the application is closed and reopened. You need to ensure that application data is available when the network connection returns. What should you recommend?
A.
Use the NetworkChange.NetworkAddressChanged event and save the data to isolated storage.
B.
Use the NetworkInterface.GetIsNetworkAvailable method and save the data to isolated storage.
C.
Use the NetworkInterface.GetIsNetworkAvailable method and save the data to the PhoneApplicationService.State dictionary.
D.
Use the NetworkChange.NetworkAddressChanged event and save the data to the PhoneApplicationService.State dictionary.