Which of the Following Is/are Advantages of the Middleware Concept

Which of the following is/are advantages of the middleware concept over the use of a LIS alone?

A) Middleware can be connected to a number of analyzers and provide a central workstation in the laboratory to monitor quality functions.
B) Middleware may allow reduction of staff assigned to instruments.
C) Middleware allows for information to flow from laboratory analyzers to the software where decision rules are applied.
D) All of the above are advantages of the middleware concept.