Explanation/Reference:
Explanation:
A: You can use Azure Notification Hubs and Firebase Cloud Messaging to push notifications to an Android application.
B: The Windows Push Notification Services (WNS) enables third-party developers to send toast, tile, badge, and raw updates from their own cloud service. This provides a mechanism to deliver new updates to your users in a power-efficient and dependable way.
D: Because the device token assigned by the Apple Push Notification Service (APNS) can chance at any time, you should register for notifications frequently to avoid notification failures.
References:
https://docs.microsoft.com/en-us/windows/uwp/design/shell/tiles-and-notifications/windows-push- notification-services--wns--overview
https://docs.microsoft.com/en-us/azure/notification-hubs/notification-hubs-android-push-notification-google- fcm-get-started