If an Enterprise Resource Planning system integrates all main business processes such Human Resources, Financial & Accounting, Purchasing, Sales management, Customer Service etc, which of the following is an example of an ERP system?

A. Betty has a system that keeps track of the accounts payable and receivable for her plumbing business. At the end of the year, the system helps her to prepare her taxes in just two hours.

B. Charlie keeps records of all his business records in a shoe box. Each week he enters all of the data into spreadsheets that automatically generate purchase orders, based on predetermined inventory reorder points. Production quotas for the coming week are also automatically generated based on customer orders.

C. Doug is a freelance photographer. He keeps records of all expenses and revenues on his cell phone and then e-mails them to himself every month. The files are stored on his personal computer and backed up to CD quarterly.

D. Alexis uses a computerized information system to keep track of all the financial data generated by her bakery. She is considering opening a new bakery on the east side of town.