The answer to your question is b hope this helps!
it was hot by an atomic. bomb
As agriculture rose children were seen as a source of labor. Regulations would later moderate this!
Answer:
Central Pacific. ... By spring 1869, Central Pacific had made it through the mountains and onto the relatively flat land of western Utah, constructing 690 miles of track through some of the most difficult terrain ever encountered by a railroad.
Explanation:
D: Build-up of troops. No peaceful country (or group) would need an army unless something big was about to happen