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Which late 1940s event prompted the United States to take steps to protect itself from Soviet espionage?
the detonation of a bomb on Russian soil
the fall of China to communism
the rise of the Soviet Union's military
O the conviction of Alger Hiss



Answer :

Final answer:

The Soviet Union's detonation of an atomic bomb in 1949 prompted the U.S. to protect itself from Soviet espionage.


Explanation:

The late 1940s event that prompted the United States to take steps to protect itself from Soviet espionage was the detonation of an atomic bomb by the Soviet Union in 1949. This event raised concerns and led to increased efforts to safeguard against Soviet espionage activities.


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