Which of the following is unlikely to be a concern of internal auditors when they evaluate how well designers undertook the design and acquisition of the hardware/system software platform to be used to support an information processing system:

a. The quality of the request for a proposal prepared for vendors based upon the configuration design

b. The extent to which end users were involved in the choice of the design configuration for the system software

c. The extent to which simulation models or queuing models were used to evaluate different configurations

d. Whether designers have attempted to maintain modularity and generality in the designs they considered