The adjusted trial balance as at 30 June 2020 below has a missing account balance. Cash at Bank Accounts Receivable Office Equipment Accumulated Depreciation - Office Equipment Capital Service Revenue Depreciation Expenses Salary Expense Debit $ Credit $ 72,000 12,500 15,000 3,000 80,000 32,500 3,000 18,000 120,500115,500 The missing account and its balance could be: O a. Accounts Payable: Credit Balance $5,000 O b. Unearned Revenue: Debit Balance $5,000 O c. Supplies: Credit Balance $5,000 O d. Bank Loan: Debit Balance $5,000 E