What should an architect be aware of when designing a product catalog in SAP Hybris Commerce? (Choose 3)

What should an architect be aware of when designing a product catalog in SAP Hybris Commerce? (Choose 3)
A . A catalog must have exactly one staged an one online version
B . The catalog, categoryand product items all carry a reference to the catalog version
C . In practice, a catalog may have many staged versions maintained concurrently
D . A product should never be created in the online catalog version
E . Staged and online data are stored in separate database tables

Answer: B,C,D