A trial balance has total debits of $20,000 and total credits of $24,500. Which one of the following errors would create this imbalance? Explain.
a.  A $2,250 debit posting to Accounts Receivable was posted mistakenly to Cash.
b.  A $4,500 debit posting to Equipment was posted mistakenly to Supplies.
c.  An entry debiting Cash and crediting Accounts Payable for $4,500 was mistakenly not posted.
d.  A $2,250 credit to Revenue in a journal entry is incorrectly posted to the ledger as a $2,250 debit, leaving the Revenue account with a $6,300 credit balance.
e.  A $4,500 debit to Rent Expense in a journal entry is incorrectly posted to the ledger as a $4,500 credit, leaving the Rent Expense account with a $750 debit balance.
f.  A $2,250 debit to Utilities Expense in a journal entry is incorrectly posted to the ledger as a $2,250 credit, leaving the Utilities Expense account with a $3,000 debit balance.