When advertising a specific number of vehicles, what requirement must dealers meet?

The correct answer is that those vehicles must be invoiced to the dealer. This requirement ensures that the dealer has legal and financial ownership of the vehicles they are advertising. Invoicing indicates that the dealer has purchased the vehicles from the manufacturer or another source, thereby having the right to sell them. This practice protects consumers by ensuring that the advertised vehicles are legitimately available for sale, thus providing transparency and accountability in the dealership's inventory.

The other options do not reflect the standard requirement for accurate advertising. For instance, while it is ideal for vehicles to be physically present on the lot, it is not strictly necessary for advertising. Additionally, requirements regarding the uniformity of pricing among vehicles or recent sales history do not pertain directly to the legitimacy of the inventory being advertised. Therefore, the invoicing requirement is the key factor that supports the integrity of vehicle advertising by confirming ownership.