Question

Which project led to the creation of a system of time zones across America?
Question 3 options:

establishing a national park system

acquiring the territory of Alaska

digging the Panama Canal

building the transcontinental railroad

Answer 1

Transcontinental Railroad, because the railroads needed coordinated schedules.

Answer 2

Answer:

On November 18, 1883, America's railroads began using a standard time system involving four time zones, Eastern, Central, Mountain and Pacific.

Explanation:

therefore your answer should be building the transcontinental railroad.