Which Two Statements About Incoming WebEx Call Notifications on IOS

Multiple Choice

Which two statements about incoming WebEx call notifications on iOS and Android applications are true? (Choose two.)

A) When running in the background on Android, Firebase Cloud Messaging must use a notification message.
B) When running in the background on Android, Firebase Cloud Messaging must use a data message.
C) Webhooks are required with the iOS SDK only when the application is in the background.
D) When running in the background on iOS, Application Push Notifications must be configured to be silent.
E) Webhooks are required in the foreground and background for iOS and Android applications.