character: Mr. Johnson
topic: Understanding Tariffs and Quotas
grade: 9
subject: Social Studies
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character: Ms. Smith
topic: Introduction to Trade Barriers
grade: 9
subject: Social Studies
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character: Mr. Lee
topic: The Impact of Tariffs on Economy
grade: 9
subject: Social Studies
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character: Mrs. Davis
topic: Comparative Analysis of Tariffs and Quotas
grade: 9
subject: Social Studies
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