Final answer:
A debit of $4,400 to Accounts Payable suggests that the transaction was a payment to a supplier to reduce the amount owed.
Step-by-step explanation:
If a bookkeeper recorded a debit of $4,400 to Accounts Payable, this most likely corresponds to a payment made to a supplier to settle a balance that was due. Accounts Payable is a liability account, and debiting this account decreases its balance, indicating that a payment was made and a liability was reduced. So, the correct answer to what the bookkeeper's last entry could be for is:
c. A payment of $4,400 to a supplier to settle a balance due.
This assumes typical bookkeeping practices where credit would increase Accounts Payable when a purchase is made on credit, and a debit to the same account would indicate a payment or reduction of that liability.