Question

Why did the development of the time zones make train schedules more reliable

Answer 1

Answer:

D

Time zones created a standard of time that all trains follow

Answer 2

D
Why did the development of the time zones make train schedules more reliable
A) time zones set the entire country to the same time 
B) Time zones measured time locally instead of country-wide 
C) Time zones made sure that each state was in only one zone 
D) Time zones created a standard of time that all trains follow

D