The adjusted trial balance as at 30 June 2020 below has a missing account balance. Debit $ Credit $ Cash at Bank 72,000 Accounts Receivable 12,500 Office Equipment 15,000 Accumulated Depreciation - Office Equipment 3,000 Accounts Payable 5,000 Capital 80,000 Service Revenue 32,500 Depreciation Expenses 3,000 102,500 120,500 The missing account and its balance could be: O a. Supplies: Credit Balance $18,000 O b. Unearned Revenue: Debit Balance $18,000 O c. Salary Expense: Debit Balance $18,000 O d. Bank Loan: Debit Balance $18,000 Clear my choice