Which of the following situations poses a separation of duties problem?

Select one:

a.Sales representatives have the authority to increase customer credit limits in $2,000 increments

b.Physical inspection of inventory quantity and condition is outsourced to a specializing firm

c.When customer payments equaling or over $250 are received in the mail, checks are sent to the cashier's office and remittance advices, which inform of the invoices paid and amount of payment, are sent to accounts receivable

d.Products are released from inventory after a warehouse employee and a shipping clerk both sign appropriate documentation