On December 1, Oren Marketing Company received $6,600 from a customer for a 2-month marketing plan to be completed January 31 of the following year. The cash receipt was recorded as unearned revenue. The adjusting entry for the year ended December 31 would include: Multiple Choice a credit to Unearned Revenue for $2,200. a debit to Services Revenue for $6,600. a debit to Services Revenue for $4,400. a debit to Unearned Revenue for $3,300. a credit to Services Revenue for $4,400