Which of the following statements is (are) true?

a. To ensure credit sales policies are followed, the system can be programmed to check a customer’s credit limit and payment history.

b. A transaction file contains records of individual business transactions and is similar to a general ledger in a manual AIS.

c. An ERP system uses a centralized database to share information across business processes and coordinate activities.

d. It is difficult for an ERP system to provide management with the up-to-date information needed to plan, control, and evaluate an organization’s business.

e. Use of pre-numbered documents makes it harder to verify that all transactions have been recorded and that none has been misplaced.