The people who traveled on the majority of the trails seen here were primarily

The people who traveled on the majority of the trails seen here were PRIMARILY

seeking new lands at low prices.

Explanation:

In the early 1800s, many people in the United States decided to migrate to the Western part of the country looking for more and better land, at affordable prices

People were trying to find new opportunities to prosper and they moved towards West. They encounter some difficulties such as the Indian Reservations and Native American Indians territories that belonged to them. Notwithstanding, people insisted and wanted a new place to dwell in. So yes, the people who traveled on the majority of the trails sought new land at low prices.