5. Principles of an efficient and effective accounting information system include all of the following except a. cost effectiveness. b. flexibility c. useful output. d. All of these options are principles. 6, Which of the following statements is incorrect? a. A major consideration in developing an accounting system is cost effectiveness. b. When an accounting system is designed, no consideration needs to be given to the needs and knowledge of the various users. c. The accounting system should be able to accommodate a variety of users and changing information needs. d. To be useful, information must be understandable, relevant, reliable, timely, and accurate