Which of the following statements is correct?

a. 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.

b. A customer's credit quality is usually determined in terms of the probability of the customer's default.

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. The optimal credit policy is determined primarily by the industry in which the firm operates and by current economic conditions.

e. A typical business credit report provides sufficient information to eliminate the need for informed human judgment in the credit decision.