Which of the following statements is correct? a. The optimal credit policy is determined primarily by the industry in which the firm operates and by current economic conditions. b. A typical business credit report provides sufficient information to eliminate the need for informed human judgment in the credit decision. c. Normally, when a credit sale is made, inventory is reduced by the cost of goods sold and an equal amount is credited to accounts receivable. d. Computers have had a significant effect in increasing efficiency in the areas of payroll and inventory, but have had little impact in accounts receivable management. e. A customer's credit quality is usually determined in terms of the probability of the customer's default.