Question

In 1800, the western boundary of the United States was:

O the Appalachian Mountains.
O Kentucky.
O the Rocky Mountains.
O the Pacific Ocean.
the Mississippi River.

Answer 1

In 1800, the western boundary of the United States was the Mississippi River.

Step-by-step explanation:

In 1800, the western boundary of the United States was the Mississippi River. This boundary was established by the Treaty of Paris in 1783, which ended the American Revolutionary War. The Mississippi River served as a natural border between the United States and the territories controlled by Spain, which included lands west of the river.

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