Question：Systems pool data from internal and external sources and make information available to senior managers, for strategic, unstructured decision-making.

　　Which word or phrase correctly completes this sentence?

　　A. Decision Support

　　B. Executive Support

　　C. Management Support

　　D. Expert

　　The correct answer is: Executive Support

　　Rationale: This is the definition of an Expert System. It is distinguished from a DSS by supporting decision-making at a higher and less structured level. Expert systems draw on a knowledge base to solve well-defined technical problems.

　　Pitfalls: 'Management', 'Expert' and 'Decision' were plausible distractors: make sure you can distinguish between the different types of system, and how they contribute to decision-making and problem solving.