The development of both the Telegraph and telephone contributed to the economic expansion of the us by increasing

The development of both the telegraph and telephone contributed to the economic expansion of the U.S. by... stabilize financial institutions of the U.S. The launch of Sputnik I and Sputnik II by the Soviet Union in 1957 led the U.S. loss of public confidence in the U.S. gov.

Explanation:

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the answer is b: an economic crisis throughout the country.

hello most volcanoes are located at either divergent or convergent plate

this is where the plate motions aswell form magma