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B. its (because It's means it is.)
The "affordability" of the automobile in the 1950s changed American culture.
Affordability is in quotes because the automobile manufacturers did something tricky. They got the US government to pay for the building and maintenance of roads.
So, unlike the train system where the train companies have to build and maintain tracks, the auto makers only had to make the cars.
This reshaped our country, allowing roads and cars to become the primary means of transportation in the country. In turn, people could then live outside of cities allowing suburbs to be created and fast food restaurants to be invented for people in the car on the go.
Transmission of communicable diseases
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Militias back then were mainly average people and later became more organized with each other or under an actual military commander or general. Sometimes, the local law required men and even young boys to have and be able to use muskets efficiently, meaning it would be easy to make a militia out of nowhere when need-be.
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During the late 1940s and early 1950s, the prospect of communist subversion at home and abroad seemed frighteningly real to many people in the United States. These fears came to define–and, in some cases, corrode–the era’s political culture. For many Americans, the most enduring symbol of this “Red Scare” was Republican Senator Joseph R. McCarthy of Wisconsin.
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