Which best explains how railroad were able to standardize their timetables in 1883

Answer: B. by working together voluntarily

In 1883, railroad companies were able to standardize their timetables. One of the best practice that they did is that they work together voluntarily for the welfare of the majority. It is the unity that they were able to construct that made the standardization of their timetables.

They created time zones, there are 4 time zones