I think the answers are B, C, E,
I wouldn't take my word on it. Wait for more answers or do some researching.
1) would be C Judicial power
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.
