How did time zones first come about?

answer:

system developed in 1869 to create consistency in railroad schedules. The earth's surface was divided into 24 time zones, one for each hour of the day.  Before time zones were established, each community set its own time, based mainly on the movement of the sun.

Explanation:

women should get jobs in the war industries

explanation:

during the time of the war women usually stayed back and got jobs to support the war by making bullets and machinery used in the war.

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d) he bring down boss tweed and tammany hall.