How did Joseph McCoy change the cattle industry? What might have happened if McCoy didn’t interfere?

In 1861 McCoy began to work in the mule and cattle industry. He expanded his business to shipping large herds of cattle to slaughter and quickly recognized flaws in the system. An average of longhorns in Texas caused their value to be only three to four dollars a head.

Explanation:

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the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.