What industry stimulated the creation of "time zones" in the United states

Eastern, Central, Mountain and Pacific

Explanation:

because On November 18, 1883, America's railroads began using a standard time system involving four time zones, Eastern, Central, Mountain and Pacific. Within each zone, all clocks were synchronized hope it helps ask if you need anything else

this is a false claim the emancipation proclamtion freed all slaves in the rebillion states

i think that the right answer is the aztecs