Event Planning Services collects fees from its cuslomers in advance. On January 1 of the current year, the balance of its Unearned Revenue account was $4,800 (CR). During January the company collected $3,000 and $700 as advance fees. during the two month period it performed services of $5,100 related to the deferred revenue. what is the balance in unearned revenue at the end of febuary

O A. credit balance of $3,400 O B. debit balance of $4.800 O C. debit balance of $3,400 O D. credit balance of $4,800