The concept of separation and balance of powers in the constitution refers to.
a. a separation of powers between various executive departments
b. a separation of powers between the national and state governments
c. a separation of powers between separate and coequal branches of government
d. a separation of individual rights from the rights that are granted to state governments

C)a separation of powers between separate and coequal branches of government.

Explanation:

the correct answer is to reduce tax

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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