When President Lincoln was assassinated in April 1865, who was his successor? Millard Fillmore
James Buchanan
Andrew Johnson
Ulysses S. Grant

With the assassination of President Abraham Lincoln, Andrew Johnson became the 17th President of the United States (1865-1869), an old-fashioned southern Jacksonian Democrat of pronounced states' rights views.

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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.