Marketing firm valassis created and managed a nutella promotion to induce trial of the product. nutella is a creamy, chocolaty, hazelnut spread that is imported into the united states from italy. a valassis polybag containing a 20-gram "coppetta" packet of nutella spread, a cracker, a nutella coupon, and a product brochure were delivered to consumers' doors via the sunday newspaper. in addition to the coupon, what type of sales promotion was used here?
a) product placement
b) sample
c) premium
d) sweep-stakes
e) deal