Question

Which of the following was a cause of Americans moving west in the early to mid-1800s?

A. Availability of new land for farming
B. Vengeful Native Americans
C. Payment by the Spanish to settle in western areas
D. The War of 1812

Answer 1

The best answer is the availability of new land for farming in the West, while in the east, most of the land has already been taken.

A very famous example for this was the Land Rushes - the races for the land that started in 1889 (that's later than the question asks, but it's connected to the question).