The balance in the Prepaid Rent account before adjustment at the end of the year is $18,000, which represents three months' rent paid on December1. The adjusting entry required on December 31 is to

a. debit Rent Expense, $12,000; credit Prepaid Rent $12,000.

b. debit Prepaid Rent, $6,000; credit Rent Expense, $6,000.

c. none of these answers are correct

d. debit Prepaid Rent, $12,000; credit Rent Expense, $12,000.

e. debit Rent Expense, $6,000; credit Prepaid Rent, $6,000.