In 1883, citizens all over America reset their clocks and watches to reflect the current time in one of four new U.S. time zones. These new time zones were the result of _____.

In 1883, railroad companies adopted standard time zones so their trains could run on coordinated, predictable schedules across different local times. This led people across the country to reset their clocks to one of four U.S. time zones. The correct choice is “American railroad companies trying to simplify and coordinate their schedules.”

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