Answer:
1. Louisiana Purchase <em><u>a treaty signed with France in 1803 by which the U.S. purchased for $15,000,000 the land extending from the Mississippi River to the Rocky Mountains and from Canada to the Gulf of Mexico.</u></em>
2. Sacagawea <em><u>"Bird Woman", 1787?–1812?, Shoshone guide and interpreter: accompanied Lewis and Clark expedition 1804–05</u></em>
3. Lewis and Clark expedition <em><u>known as the Corps of Discovery Expedition, was the United States expedition to cross the newly acquired western portion of the country after the Louisiana Purchase. </u></em>
4. Zebulon Pike <em><u>was an American brigadier general and explorer for whom Pikes Peak in Colorado was named</u></em><em><u>.</u></em>
5. William Clark <em><u>was an American explorer, soldier, Indian agent, and territorial governor.</u></em><em><u /></em>
Answer:
option D is the right answer.
