Which of These Errors Would Be Detected by a Trial

Multiple Choice

Which of these errors would be detected by a trial balance?

A) A cash sale was recorded in the sales account as $237 instead of $273 but was correctly recorded in the bank account.
B) Office salaries were recorded as office expenses.
C) The sales assistant pocketed the cash from a cash sale and did not ring it up on the register.
D) Purchase of inventory on credit was recorded as a debit to the plant and equipment account and a credit to creditors.