7. Demand for beef led cowboys to move Texas steer on cattle trails to faraway American cities, but by the 1890s the era of the cowboys was over, due to

A. the rising cost of transportation
B. the expansion of the railway system
C. killing of too many cattle
D. the anger of homesteaders

You are a historian studying britain. you believe that a rise in the average british citizen's income between 1800 and 1850 can be linked to a rise in literacy. you have many sources of data from a town in britain covering that period. which four types of data would you study to investigate this theory?