Which line represents the Oregon Trail? What was one geographical factor that attracted settlers to the Oregon Country? A. Line number 2 represents the Oregon Trail. Rich farmland was one geographical factor that attracted settlers to the Oregon Country. B. Line number 1 represents the Oregon Trail. Rich farmland was one geographical factor that attracted settlers to the Oregon Country. C. Line number 3 represents the Oregon Trail. Abundant gold deposits in Oregon’s rivers attracted settlers with the prospect of great riches. D. Line number 4 represents the Oregon Trail. The discovery of oil along Oregon’s Pacific Coast in 1849 sparked an oil boom that attracted thousands of new settlers to the region.