the best answer would be c
1925 - Calvin Coolidge's inauguration was the first to be broadcast nationally over radio waves. In 1949, PresidentHarry S. Truman was the first to deliver his inaugural address to a televised audience; Kennedy would be the first to do so on color television in 1961.
Answer:
Colonial rivalry was a cause of the First World War. First of all, colonial rivalry led to strained relations among the European powers. In Africa, all the European powers except Austria and Russia had colonies there. Thus there were many clashes among France, Britain, Germany and Italy.
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Answer:
In the 1900s, the United States became a world power. It helped win World War I and World War II. It fought the Cold War against communism.