A Mixed Economy: The Role of the Market. The United States is said to have a mixed economy because privately owned businesses and government both play important roles. ... When economic forces are unfettered, Americans believe, supply and demand determine the prices of goods and services.
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<span>Sand dunes can encroach on human habitats. Sand dunes move through a few different means, all of them assisted by wind. One way that dunes can move is through saltation, where sand particles skip along the ground like a rock thrown across a pond might skip across the water's surface. When these skipping particles land, they may knock into other particles and cause them to skip as well. With slightly stronger winds, particles collide in mid-air, causing sheet flows. In a major dust storm, dunes may move tens of meters through such sheet flows. And like snow, sand avalanches, falling down the steep slopes of the dunes that face away from the winds, also moving the dunes forward.
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Answer: there are
Explanation: A man who stands in front of his wife and child during a robbery is an example of chivalry.
A man opening his date's car door for her to get out is an example of chivalry.
B isn’t the correct answer
