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OpenStudy (anonymous):
What more recent events/inventions made the original "hotline" obsolete? Select one: a. Cell-phone Technology in 1990s b. Sputnik's launch in the 1960s c. Fall of the Soviet Union in the 1980s d. Development of fiber optics in the 1980s
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OpenStudy (anonymous):
It should be A but not sure.
OpenStudy (jareeek):
im going to agree
OpenStudy (anonymous):
A
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