A standard that uses the Object Request Broker (ORB) to implement
exchanges among objects in a heterogeneous, distributed environment
is called:

A.
An Interface Definition Language (IDL)

B.
Open Architecture

C.
The Object Management Group (OMG) Object Model

D.
A Common Object Request Broker Architecture (CORBA)

Explanation:
* the OMG Object Model provides standard means for describing the externally visible
characteristics of objects.
*Answer Open Architecture is a distracter.
*IDL is a standard interface language that is
used by clients to request services from objects.