What Is the Difference Between a Decision Support System (DSS)

Multiple Choice

What is the difference between a decision support system (DSS) and an expert system (ES) ?

A) A DSS supports the novice users; an ES supports the analyst or expert
B) The DSS requires considerable knowledge from the user; the ES provides considerable knowledge to the user
C) The ES requires considerable storage space for the needed information; the DSS does not
D) The DSS requires rules or domain knowledge; the ESS requires business models