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Answers:
The exchange introduced a wide range of new calorically rich staple crops to the Old World—namely potatoes, sweet potatoes, maize, and cassava. The primary benefit of the New World staples was that they could be grown in Old World climates that were unsuitable for the cultivation of Old World staples.
Answer:
change in price of a substitute
resources producer’s ability to keep up with demand competition
substitute goods changes in consumer spending
Explanation:
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Ronald Reagan;
he was nominated twice for President.
