Lewis and Clark led the Corps of Discovery, a group that was tasked with finding a route to the Pacific Ocean. This would be option D.
The Lewis and Clark expedition took effect in 1804, when they set off to find a route to the Pacific Ocean. On the way there, they were aided by Sacagawea and other Native Americans, and they took notes of things they have never seen before such as plants, animals, native tribes, and unmapped geographical features.