What document is needed for vehicle ownership transfer after a private sale?

Answer: B — Title

To transfer vehicle ownership after a private sale, the title is the crucial document required. The title serves as official proof of ownership and contains important information specific to the vehicle, including the Vehicle Identification Number (VIN), make, model, and the name of the previous owner. When a vehicle is sold, the seller must sign the title over to the buyer, facilitating the legal transfer of ownership. While other documents, such as a sales contract, insurance certificate, or authorization letter, may be helpful for the transaction or required for other purposes, they do not fulfill the specific need for demonstrating ownership transfer. The title is essential for the buyer's registration of the vehicle with the appropriate authorities, making it the key document in this process.