Answer:
A
Explanation:
Since the population of the cities increased with more factories being built, A seems to be the best choice: More people moved to the city in order to work in the factories.
Answer: Around 1900, European nations built up their military forces, formed alliances, and expanded their colonial holdings in their efforts to
1. Force their enemies to start wars
2. Maintain a balance of power
3 Put a conscription system in place
4. End the spirit of militarism
