The answer is a
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<span>The British and French blockades had disastrous effects on United States shipping. For instance before 1806 the U.S. was getting rich on European trade with Britain and France. Now an American ship bound for French ports had to stop first at a British port for inspection and payment of fees. hope this help.</span>
Answer: After world war II
Explanation:
Political science and comparitive politics changed after world war II, there was a better view to how politics was now seen instead of the descriptive and atheoretical knowledge that was held.