ABC Corp accumulates the following adjustment data at December 31. 1. Revenue of $1,600, collected in advance, has been recognized because the firm has completed its performance obligation. 2. Salaries of $600 are unpaid. 3. Prepaid rent totaling $500 has expired. 4. Supplies of $450 have been used. 5. Revenue recognized but unbilled total $750. 6. Utility expenses of $250 are unpaid. Which adjustments above are required because of deferrals? O 1,3 & 4 2, 5 & 6 O 1, 2, 5 & 6 O 3 & 4