Which new technology of the 1800 had the greatest impact on cattle ranchers on the great plains

Bull files a suit against clay in a state court over payment due on a short-term lease of grazing land. the case proceeds to trial, after which the court renders a verdict. the case is appealed to an appellate court. after its review of bull v. clay, the appellate court upholds the lower court’s verdict. the appellate court has:

Today, the a. caesar b. bishop c. pope d. tsar still heads the roman catholic church, which is centered on rome. there is no longer a byzantine emperor, but each country has its own a. governor b. patriarch c. prefect d. council to lead the eastern orthodox church there.

Why are the majority of the world's economies mixed? what may happen to the "pure" types of economies (traditional, socialist/command, market capitalist) when they incorporate elements from other economic models?