Answer:
C; George Washington, Meriwether Lewis, Henry Knox
Explanation:
Henry knox was first secretary of War under George Washington. Prior to George Washington's presidential run he was a major part of the war and leader of the Continental Army. Meriwether Lewis was an explorer but was a soldier prior.
Approximately 1500 people lost their <span>life.</span>
The great ancient civilizations flourished around river valleys because the rivers produce rich fertile soil and a supply of water for irrigation of crops and human consumption. This allows for the agricultural production to be greater and it can sustain more people.