For number 7, I believe it is A contract.
For number 8, I also believe it is A, which is putting money into an account.
For number 9, I am not 100% sure, but from some research I believe it is C, which is to record deposits, withdrawals, and checks written so you know the balance of your checking to record the number of checks that you have written each month. When researching, I found that in accounting, a check register is a document, usually part of the general ledger, used to record financial transactions in cash. I believe that is closest to option C.
Hope this helps!