Final answer:
According to the Treaty of Paris (1783), the western boundary of the United States would be the Mississippi River.
Step-by-step explanation:
The subject of this question is History and the grade level is High School. According to the Treaty of Paris (1783) ending the American Revolution, the western boundary of the United States would be the Mississippi River. This meant that territories west of the Mississippi River would be part of the United States. Britain would retain only those territories they controlled at the war's end, and the United States would not use the property of Loyalists to repay prewar debts owed. The correct answer is therefore that the western boundary of the United States would be the Mississippi River.
Learn more about Treaty of Paris (1783)