Which of these errors would be detected by a trial balance? Select one: O a. A cash sale was recorded in the sales account as $237 instead of $273 but was correctly recorded in the bank account. O b. Office salaries were recorded as office expenses. O c. The sales assistant pocketed the cash from a cash sale and did not ring it up on the register. O d. Purchase of inventory on credit was recorded as a debit to the plant and equipment account and a credit to creditors