Which of the Following Errors, Each Considered Individually, Would Cause

Which of the following errors, each considered individually, would cause the trial balance totals to be unequal?

A) Cash received from customers on account was posted as a debit of $600 to Cash and a credit of $600 to Accounts Payable
B) A transaction was not posted
C) A payment of $446 for insurance was posted as a debit of $446 to Prepaid Insurance and a credit of $446 to Cash
D) A payment of $1,266 to a creditor was posted as a debit of $12,666 to Accounts Payable and a credit of $1,266 to Cash