A. No analytic events can be sent to MCS when there is no network connection.

B. If you have used an appropriate MCS client SDK, analytic events will be written to a file, which can be manually uploaded into MCS.

C. The iOS and Android operating systems automatically cache REST calls when they are offline and will replay them when connectivity is restored.

D. If you have used an appropriate MCS client SDK, analytic events will be cached and sent when connectivity is restored.