The right answer is D, Conflict Theory, This theory is part of the modern sociology and explains when a conflict transcends the individual and reaches a position or social level. Social conflicts are usually due to the scope of power, status or resources that the society they want to neutralize possesses.
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The correct answers are A. And D. Trade in Africa, Europe and Asia was booming and Greece was expanding its empire under the Alexander leadership. Alexandria in Egypt became the center of knowlege with the famous library that still stands today.