Economics is a social science because:
a. it is based on studying the actions of individuals.
b. it applies the scientific method to the study of the interactions among individuals.
c. it considers human behavior, particularly decision-making behavior.
d. all of the above.

 The correct answer is :  D. all of the above.

Explanation:  The economy is considered a social science because it is based on scientific methods to build theories that help explain the behavior of people, groups and organizations. Economists use scientific observation and deduction in their research. That is, the economy studies the human activities and economic behavior that arise when scarce resources are exchanged.

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modern american cars are not available due to trade restrictions

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.