When must a dealer's name be included in the ad?

Answer: B — When advertising vehicles for sale

A dealer's name must be included in an ad when advertising vehicles for sale because it is required by law to provide customers with accurate and transparent information about the seller. Options A, C, and D are incorrect because they do not involve advertising the sale of vehicles. While advertising service specials and sponsoring events may also require the dealer's name, it is not a requirement like it is when advertising vehicles for sale. Funding community projects may not even involve advertising at all, making it an irrelevant choice. Therefore, the only correct choice is B.