During the Cold War era, the United States and the Soviet
Union were hesitant to become
involved in direct military
conflict mainly because of
a. the threat of China to both nations
b. pressure from nonaligned nations
c. the potential for global nuclear
destruction
d. mutual dependence on Middle East
petroleum

c. the potential for global nuclear destruction

Explanation:

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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