The correct answer is rapid industrialization
Those who had the wealth to enter the business got even more wealthy because they could exploit a system that wasn't yet monitored or regulated because it was new. Those who were simple workers became even poorer because their labor was being exploited by monopolies and cartels made by the wealthy businessmen.
Answer:
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C President Theodore Teddy Roosevelt
Power, can be a possible answer. If we own strong weapons we can intimIdate other countries. We will have an advantage in warfare.