Answer:
Step-by-step explanation:
A.) They discovered the Northwest Passage through a series of river systems across the continent of North America.
This statement is not an accomplishment of Lewis and Clark. In fact, one of the primary goals of their expedition was to find a water route across the continent of North America, known as the Northwest Passage, but they were not able to find it. They did, however, explore and map the northwest portion of the United States, meet Sacajawea, and successfully reach the Pacific Ocean after a year and a half of travel.