The answers are
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21)
Answer:
Blockade
Explanation:
Basically blocking supplies from going in. From either allied ships or trade.
Representatives of Spain and the United States signed a peace treaty in Paris on December 10, 1898, which established the independence of Cuba, ceded Puerto Rico and Guam to the United States, and allowed the victorious power to purchase the Philippines Islands from Spain for $20 million.
He succeeding in paying off the national debt for a while, which could have enticed other countries to trade with the U.S, that and he made money safer to store and withdraw out of banks.