Which of the Following Is Most Likely an Example of a Business

Which of the following is most likely an example of a business promotion tool?

A) a free DVD for customers who purchase a new television at a retail store
B) a trade fair showcasing a new audio system developed by an electronics firm
C) a sweepstakes program inviting customers to enter for the chance to win a new car
D) a toaster being sold at half its list price for any buyer who purchases a food processor
E) a display allowance for retailers who feature a manufacturer's product in a favorable manner