Which of the Following Best Defines Decision Support Systems

Which of the following best defines decision support systems?

A) It refers to computer software systems that allow managers to see how outcomes vary when assumptions or data are altered.
B) It is a network of remote servers used to store reusable data.
C) It is a network of systems that incorporates decision rules used by people who are considered to have expertise in a certain area.
D) It refers to the set of topics on which a human resource information system collects and maintains information.
E) It refers to online training and development materials that employees can access at their own convenience from anywhere around the world.