Pattie’s Event Planning Service collects her fees from her customers in advance. At January 1, 2010, 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