Do all project developers using ODI need to consolidate their own local metadata repositories?

Do all project developers using ODI need to consolidate their own local metadata
repositories?

A.
No, ODI uses a centralized relational metadata repository that all the developers share.

B.
No, ODI proprietary metadata server allows all developers to share the common
metadata of a specific project.

C.
Yes, you have to invoke a dedicated web service to synchronize the metadata using the
Oracle Service Bus.

D.
Yes, the local metadata needs to be transmitted via FTP and synchronized with a
dedicated proprietary engine, creating a common metadata model for all developers.