Advertising is a form of selling. For thousands of years there have been individuals who have tried to (1)_____ others to buy the food they have produced or the goods they have made or the services they can (2)_____. But in the 19th century the mass production of goods (3)_____ the Industrial Revolution made person-to-person selling inefficient. The mass distribution of goods that (4)_____ the development of the highway made person-to-person selling (5)_____ slow and expensive. At the same time, mass communication, first newspapers and magazines, (6)_____ radio and television, made mass selling through (7)_____ possible. The objective of any advertisement is to convince people that it is in their best (8)_____ to take the action the advertiser is recommending. The action (9)_____ be to purchase a product, use a service, vote for a political candidate, or (10)_____ to join the Army. Advertising as a (11)_____ developed first and most rapidly in the United States, the country that uses it to the greatest (12)_____. In 1980 advertising expenditure in the U.S. exceeded 55 billion dollars, or (13)_____ 2 percent of the gross national product. Canada spent about 1.@2 percent of its gross national product (14)_____ advertising. (15)_____ advertising brings the economies of mass selling to the manufacturer, it (16)_____ benefits for the consumer (17)_____. Some of those economies are passed along to the purchaser so that the cost of a product sold primarily through advertising is usually far (18)_____ than one sold through personal salespeople. Advertising (19)_____ people immediate news about products that have just come on the market. Finally, advertising (20)_____ for the programs on commercial television and radio and for about two thirds of the cost of publishing magazines and newspapers.