The two western rivers used most often were the:

Question

Mississippi River
St. Lawrence River
Ohio River
Colorado River

Answer 1

The two western rivers that were used most often are the Mississippi River and the Ohio River. The Mississippi River is a major waterway that flows south through the central United States, while the Ohio River is a significant tributary of the Mississippi, historically serving as a key route for transportation and trade. The St. Lawrence River is more associated with eastern Canada and the northeastern United States, and the Colorado River is primarily known for its significance in the southwestern United States.