The United States Changed to Standard Time Zones When

question 16

Multiple Choice

The United States changed to standard time zones when

• A) Congress passed a law establishing this system.
• B) the major rail lines decreed common fixed times so that they could keep schedules and avoid wrecks.
• C) factories demanded standard time schedules.
• D) long-distance telephones required standard time coordination.
• E) All of these choices are correct.

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