Answer:
Correct answer is C. manorial system of Western Europe during the Middle Ages.
Explanation:
Option C is the correct one as it refers to the manorial system that existed in Europe in Middle Ages that was based on the division of land that senior gave to his vassals who were controlling the manors. Farmers or the peasants were doing all the hard work on those manors and they lived in this small cottages.
Option A is not correct as manorial system didn't existed during Alexander's period.
Option B is also not correct as it had no connections with the Silk Road whatsoever. Silk Road was connected to the trade system.
Option D is not correct as in India manorial system didn't developed mostly due to their strict caste system.
A triumvirate (Latin: triumvirātus) is a political regime ruled or dominated by three powerful individuals known as triumvirs (Latin: triumviri). The arrangement can be formal or informal. Though the three are notionally equal, this is rarely the case in reality. The term can also be used to describe a state with three different military leaders who all claim to be the sole leader.
In the context of the Soviet Union and Russia, the term troika (Russian for "group of three") is used for "triumvirate". Another synonym is triarchy.
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By the given statement in question, Truman wanted to imply that the effect of communism was growing and if it could not be checked by aiding such countries as Greece and Turkey, then it would have far reaching effects. Truman feared that communism would slowly grip these countries in financial trouble and spread to the Latin American countries and the countries in the East at a very fast rate.