How to Data distribution to operational systems via services (SOA) or ALE?

How to Data distribution to operational systems via services (SOA) or ALE?
A . Can be implemented based on standard capabilities and synchronization (for example, use of extendable SOA services)
B . Any system can be involved as source or target
C . Pre-built integration for selected SAP systems
D . De-central creation triggers a process in SAP MDG

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Answer: A,B,C