Which is based on the Supremacy Clause, federal law preempts state law, even when the laws conflict. Thus, a federal court may require a state to stop certain behavior it believes interferes with, or is in conflict with, federal law.
1.7 billion people in 1950 to 4.1 in 1990 and to 4.9 billion in 2000
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The correct answer is C; Cities developed professional firefighting and police forces.
Further Explanation:
The city dwellers lived in bad conditions during the late 1800's. The streets were not paved, there were feces in the streets from the horses, gangs had started and riots were commonplace. The crime and fires started by arsonists were getting worse each day, because more people were living in the city.
To stop the crimes and fires, the city developed new ways to improve the life of the city-dwellers. The started their first police force and also a firefighter force. They also paved the streets, and put in sewers throughout the city. During this time they also made the suburbs and started regulating the housing in the city.
Learn more about the city dwellers in New York at brainly.com/question/13412399
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