Final answer:
The introduction of the steam-powered printing press, expansion of urban populations, and the rise of advertising were the changes that helped lead to the creation of the 'popular press' in America.
Step-by-step explanation:
The changes that helped lead to the creation of the 'popular press' in America were:
- Introduction of the steam-powered printing press: This innovation allowed for faster and cheaper production of newspapers and increased their circulation.
- Expansion of urban populations: As cities grew, there was a greater demand for news and information, leading to the rise of newspapers.
- Rise of advertising: Newspapers started relying on advertising revenue, which allowed them to lower their prices and become more accessible to the general public.
These three factors played a significant role in the development of the 'popular press' in America.
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