When a Real-Time Computerized Processing System Is in Use,the Computer

When a real-time computerized processing system is in use,the computer controls can be strengthened by

A) Providing for the separation of duties between data input and error listing operations.
B) Using a systems development life cycle for authorization,user involvement,and testing of program modifications.
C) Preparing batch totals to provide assurance that file updates are made for the entire group of transactions.
D) Performing a validity check of an identification number before a user can obtain access to the computer files.