help please!

1. the bank erroneously charged little friends pets bank account for $900.50 for a check that was correctly written and recorded by little friends pets as $990.50. to reconcile the bank account of little friends pets at the end of the month, you would:

a. add $90 to the cash balance according to the bank statement

b. add $90 to the cash balance according to little friends pets records

c. deduct $90 from the cash balance according to the bank statement

d. deduct $90 from the cash balance according to little friends records