Voiding of the purchase contract requires that you immediately return what to the customer?

Answer: D — All of the above

Voiding of the purchase contract requires that you immediately return any down payment, deposit, and title for a trade-in vehicle to the customer. This is because voiding the contract means that the transaction is canceled and all terms are reversed. As for the other options, A and B are not sufficient as they only cover parts of the transaction, while C only applies if there was a trade-in vehicle involved. Therefore, option D is the correct answer as it covers all possible scenarios for returning items to the customer when voiding the purchase contract.