Procter & gamble, the maker of crest brand toothpaste, has modified this brand to include whiteners. to encourage consumers to adopt this brand, p& g gave away free samples along with a high-value coupon on the purchase of a tube. the hope was that consumers would try the brand, purchase it at a discount, and finally buy it at full price. this is an example of
a. step learningb. stagingc. steppingd. shapinge. modeling