The best and most correct answer among the choices provided by your question is the first choice.
The map describes the Louisiana Purchase.
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The correct answer is C) the Lewis and Clark expedition.
The map describes the Lewis and Clark expedition.
In 1804, the United States President Thomas Jefferson ordered Meriwether Lewis to explore the unknown territories that were located west the Mississippi River after the Louisiana Purchase. Lewis asked William Clark to be his companion, and they started the exploration that lasted two years. The expedition ended in 1806 and both explorers visited President Jefferson in Washington to address their findings.