3) Which of the following about operational system characteristic is/are TRUE? < A. Reports from operational systems are often used to compare the performance of one period to another period, and give useful feedbacks. < B. Operational systems produce periodic reports as output, e.g. weekly, daily and monthly reports. < C. Output information is very detailed, e.g. paychecks have details on the worksheet of each employee's gross and net pay. D. Transactions are frequent, repetitive and in high quantities. < E. None of the above. H