Amir's ending balance in his checkbook is $1,550. After reconciling his checkbook his reconciled ending balance is $1,523. Which of the following is a possible cause for this error? A. Chances are that he transposed a number in his checkbook register. B. He double-counted a $15 ATM withdrawal in his checkbook register. C. He marked a $37 check as "cleared" when it had not actually cleared the bank. D. He wrote down a $54 check as a deposit in his checkbook register