[单项选择] The free enterprise has produced a technology capable of providing the American consumer with the largest and most varied marketplace in the world. Technological advances, however, have come hand-in-hand with impersonal mass marketing of goods and services. Along with progress, too, have come some instances of manipulative advertising practices and a great increase of products whose reliability, safety and quality are difficult to evaluate. Today’’s consumers buy, enjoy, use and discard more types of goods than could possibly have been imagined even a few years ago. Yet too often consumers have no idea of the materials that have gone into the manufacturer’’s finished product or their own motivation in selecting one product over another. Easy credit and forceful techniques of modern marketing persuade many consumers to buy what they cannot afford. The consequent overburdening of family budgets is a problem for consumers at all economic levels. It is not unusual for families t
A. the free enterprise system in America
B. the difficulty of living on a fixed income
C. innovative techniques in food processing
D. the advances of advertising techniques

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