Which of the following is a control activity in relation to accuracy? O a. When rental income is received, the accountant checks that the amount is in accordance with the rental agreement. O b. The accountant reviews building repairs invoices around year-end to see which period they are recorded in. The accountant reviews newspapers to see that purchased advertisements appear as expected. O d. At the end of each month, the accountant reviews whether income has been received for all current rental agreements. C