b. All of the above because 1. so many people watch TV and listen to the radio that its an easy way to get people hungry and thinking about their product and 2. everyone wants to save money so putting out coupons will grab a consumers attention and most likely will lead them to at least try out the product since its cheaper and 3. if there are in-store food samples, then the customers attention will be grabbed and if they like it, they'll most likely buy it.
Hope this helps!
