Which shared American value is explicitly stated in the Declaration of Independence? a. that slavery should not exist in America

b. that everyone is entitled to equal treatment under the law

c. that all citizens, regardless of age, should have the right to vote

d. that one religion is superior to all others

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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geography

this is because warmer climates often don't get people sick from the flu and regions where it was often colder more people received the flu. hope this if you need more reasoning i am here to