Amajor goal of the lewis and clark expedition was to
a. gather information about natural resources west of the mississippi river.
b. gain control over north americans living west of the mississippi river.
c. drive the spanish out of the lands of the southwest.
d. drive the french out of fur trading forts along the mississippi river.

Option: A. gather information about natural resources west of the Mississippi River.

Explanation:

After acquiring Louisiana territory from French, Thomas Jefferson sends Lewis and Clark for an expedition. The expedition served in establishing trade with the Natives and strengthened the right of the United States in the region. Lewis and Clark made an outstanding contribution in discovering new plants and animals like a swift fox, grizzly bear, prairie dog, etc.  

the answer is a. harriet tubman was a nurse on the battlefield.