1. What caused the United States to adopt the policy of containment? -the spread of communism on several continents

-the spread of communism across Europe

-Soviet rejection of the Marshall Plan

-a desire to prevent prosperity in Germany
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I think it's the 1st one

Explanation:

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.