AAA Corporation has the following trial balance (unadjusted on December 31, 2019: Cash Accounts receivable Prepaid insurance Prepaid rent Supplies Building Accumulated Depreciation Accounts payable Unearned service revenue Common Stock Retained earnings $36,575 8,902 20,389 28,600 9,312 270,000 $70,000 40,300 76,210 176,428 10,840 $30,000 of the unearned service revenue was earned at the end of the year. Which of the following is the adjusting entry required on December 31, 200X? Debit $30,000 to Unearned Service Revenue, credit $30,000 to Service Revenue Debit $30,000 to Cash, credit $30,000 to Service Revenue Debit $30,000 to Accounts Receivable, credit $30,000 to Service Revenue Debit $30,000 to Service Revenue, credit $30,000 to Unearned Service Revenue