Knowing what time it was as one traveled across the vast North American continent

before 1883 was more art than science. Most towns had their own local time, generally
based on the sun's position at its zenith, which wreaked havoc on the railroad industry.
Imagine having to plan shipping and transportation across thousands of miles of tracks
spanning an entire continent. Now imagine doing this when no one could even agree on
what time it was! The powerful railroad companies solved this conundrum by dividing the
continent into four different time zones, creating the universal time-keeping system in use
today.

What technique often used in fiction helps the reader better understand the need for
uniform time zones?
alluding to the railroads as if they were protagonists in an adventure
employing imagery to establish the setting before describing the conflict
asking the reader to put him or herself in the situation of a character

PICK ONE OF THE GIVEN OPTIONS ABOVE

employing imagery to establish the setting before describing the conflict