To Develop Expert Systems, Programmers Need To

To develop expert systems, programmers need to:

A) create a single open-ended question for a user to answer to provide a solution to a problem.
B) devise a program to mimic an expert's approach to solve a particular problem.
C) incorporate rules that differ from what a human expert would suggest.
D) devise a system that reaches a decision and provides a recommendation by asking a user only one question.