The united states' involvement in the korean war was a result of which of the following? select one: a. treaty obligation to protect japan from attack b. an international effort authorized by the united nations c. membership in the north atlantic treaty organization d. a unilateral effort to prevent the spread of communism in asia

The right answer is  b. An international effort authorized by the United Nations.

Explanation:

The real motive of the USA was to stop what was perceived as a deliberate move of communist expansion in Asia by Moscow and its allies. Actually, it wasn´t so. After the invasion of South Korea by the North, the Truman administration mobilized forces and got a quick resolution by the UN Security Council that allowed the Americans to enter the conflict as a UN force.

“a committee reviews the bill and marks it up to make it more viable and to reflect interests 

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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