You are developing a Windows Store app. You configure the app to allow a free trial period.
You need to prompt the user to purchase the full version of the app when the trial period expires.
What should you do?
A. Call the getAppReceiptAsync( ) method of the Windows.ApplicationModel.Store.CurrentApp object.
B. Call the getProductReceiptAsync( ) method of the Windows.ApplicationModel.Store.CurrentApp object and provide the app’s product ID as an argument.
C. Call the requestProductPurchaseAsync( ) method of the Windows.ApplicationModel.Store.CurrentApp object and provide the app’s product ID as an argument.
D. Call the requestAppPurchaseAsync( ) method of the Windows.ApplicationModel.Store.CurrentApp object.
