Why would you use the Mediator component in a Service Component Architecture (SCA) application Instead of using Oracle S

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Why would you use the Mediator component in a Service Component Architecture (SCA) application Instead of using Oracle Service Bus?

A. Oracle Service Bus runs out side of a SCA application. Therefore, the Mediator is the only choice for translation and transformation tasks in an SCA application.
B. The Mediator is much faster than Oracle Service Bus.
C. The Mediator supports transactions, but Oracle Service Bus does not.
D. It is always better to use Oracle service Bus Instead of the Mediator.