Answer:
D. television
Explanation:
During the 1950s and 1960s, television was introduced to the US, and companies took off from there. Television evolved from silent, black and white scenes to color.
Previously, the US was already regarded by many as a nation of prosperity and wealth, and this invention only reinforced that.
Hope this helps!
The Marshall plan helped Europe to recover from ruins of world war ii.
The reasons why World War I happened are multiple and complex. One important is the fact that Germany lacked any real colonies prior to World War I, at least compared to the other nations which had massive and important colonies such as Great Britain or France. Another thing was general dissatisfaction and nationalism within the Austro-Hungarian empire.
