Answer: i think it is the first one
In 1883, it was the "railroad industry" that was responsible for creating the first system of time zones in the United States, since the introduction of rail travel meant that there needed to be a set table of departure and arrival times across the US.
What are the "these" you speak of?
Answer:
Common Sense.
Explanation:
Without Common Sense How Could You Understand An Question Asked?
