which best explains how railroad companies were able to standardize their timetables in 1883?\nby combining…

which best explains how railroad companies were able to standardize their timetables in 1883?\nby combining into a single railway company\nby working together voluntarily\nby unionizing their labor forces\nby complying with federal legislation

which best explains how railroad companies were able to standardize their timetables in 1883?\nby combining into a single railway company\nby working together voluntarily\nby unionizing their labor forces\nby complying with federal legislation

Answer

Brief Explanations:

In 1883, railroad companies standardized timetables by voluntarily working together. There was no single - company merger, unionizing labor forces was not related to timetable standardization, and there was no federal legislation at that time for this purpose.

Answer:

by working together voluntarily