Answer: By working together voluntarily
Explanation:
Before the current time-zones in the United States and Canada came into effect, the various towns and cities had their own times depending on the position of the sun amongst other things. This made scheduling a nightmare for the Railroad comapnies who would have to list multiple times for the same train.
Burdened by this and powerful enough to change it, the Railroad companies met and decided to work together voluntarily to divide the United States and Canada into 4 zones which were quite similar to the ones in use today. These zones went into effect in 1883 and were officially adopted by Congress in 1918.
<span>exporting products they had grown or made.</span>
FULL ANSWER
Northerners became less interested in rebuilding the South as jobs became more scarce. At the same time, the Democratic Party started to gain more ground in Congress and wanted to gain control of the White House.
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