Answer:
D. They were trying to determine the quickest route to reach the Yellowstone River.
Explanation:
Meriwether Lewis and William Clark formed a pair of explorers who led the first great exploratory expedition of the North American continent, leaving from the East and going towards the West until the coast of the Pacific Ocean, with later return.
On July 3, after crossing the Continental Divide, the explorers split into two groups for Lewis to explore the Marias River and for them to determine the fastest way to reach the Yellowstone River. They met some Blackfeet Indians. The meeting was cordial but at night the Indians tried to steal the guns. In the ensuing struggle, two Indians were killed, the only ones blamed for the expedition. Lewis's group was made up of four men: besides him were Drouillard and the Field brothers, who traveled 100 miles a day to camp again. Clark, meanwhile, had entered Crow territory. These Indians were reputed to be horse thieves. At night, half of Clark's horses had gone, but no Indians had been spotted. Lewis and Clark remained separated until the confluence of the Yellowstone and Missouri Rivers on August 11. Clark's group descended down river by boat. At the meeting, one of Clark's hunters, Pierre Cruzatte, who was blind in one eye, confused Lewis with a moose and shot him in the leg. After the meeting, the groups quickly returned home to the Missouri River and arrived in St. Louis on September 23, 1806.
