Functional acknowledgements are used:

A.
as an audit trail for EDI transactions.

B.
to functionally describe the IS department.

C.
to document user roles and responsibilities.

D.
as a functional description of application software.

Explanation:

Functional acknowledgements are standard EDI transactions that tell trading partners that their
electronic documents were received. Different types of functional acknowledgments provide
various levels of detail and, therefore, can act as an audit trail for EDI transactions. The other
choices are not relevant to the description of functional acknowledgements.