<span>c. the amount of product sold increased
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~ Fire</span>
During WWII Germany used the tactic of attack called the blitzkrieg and it is where they used large amounts of fast tanks and aircraft to invade countries quickly and surprise the enemies, the downside was that this used up a lot of gasoline very quickly.
Answer: Adam Smith described the opposing, but complementary forces of self-interest and competition as the invisible hand. While producers and consumers are not acting with the intent of serving the needs of others or society, they do. Smith argued against mercantilism and was a major proponent of laissez-faire economic policies. In his first book, "The Theory of Moral Sentiments," Smith proposed the idea of an invisible hand—the tendency of free markets to regulate themselves by means of competition, supply and demand, and self-interest. 1
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Other Populist-endorsed measures included bimetallism, a graduated income tax, direct election of Senators, a shorter workweek, and the establishment of a postal savings system. These measures were collectively designed to curb the influence of corporate and financial interests and empower small farmers and laborers.