Answer:
c. "Currency Exchange"
Explanation:
According to my research on Economics, I can say that based on the information provided within the question the term being described in the question is called "Currency Exchange". When exchanging currency for example, Argentinian Peso (ARS) with United States Dollar (USD), There are two values a sales price and a buying price.
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Answer:
The power to coin money, to regulate commerce, to declare war, to raise and maintain armed forces, and to establish a Post Office.
Answer: Class stratification
Explanation: Class stratification can be defined as the division of society on the basis of access of different sections of he society on the resources available. Class stratification identifies the religious, economic or cultural difference between different sections. It is a form of social stratification.
Under such a stratification the section having higher level of income have higher level of power in the society.