He predicted "that the day will come when ... you will have to make a ... an area of the new Czechoslovakia with a significant German-peaking population"
The answer would be B because he is restricting people's rights for their own gain.
Mostly it was exhaustion, lack of supplies, new diseases (and old disease that became more common.) Also cold weather, bandits, and oxen dying on the trip.
They Unionize migrant workers!
<u><em>Corporate structure and frenzied investment/speculation, insufficent grass to support long drives, ranges were shrunk by railroads, severe weather in 1885-1887.</em></u>
<u><em>The cattle frontier ended because barbed wire was invented, which replaced the need for cowboys. Weather also influenced the downfall, as blizzards trapped herds and droughts caused fire. These disasters destroyed land, and many animals were lost. </em></u>