Pattie's Event Planning Service Collects the Fees from Their Customers

Pattie's Event Planning Service collects the fees from their customers in advance.At January 1,2012,the balance of her Unearned revenue account was a credit of $4,000.During January and February,she collected $2,000 and $1,000 respectively.During the two-month period,she rendered services of $5,500.At the end of February,her adjusted trial balance will show what balance in Unearned revenues?

A) Debit balance of $3,000
B) Credit balance of $3,000
C) Debit balance of $2,300
D) Credit balance of $1,500