The feudal system was just like an ecosystem - without one level, the entire system would fall apart. The hierarchies were formed up of 4 main parts: Monarchs, Lords/Ladies (Nobles), Knights, and Peasants/Serfs. Each of the levels depended on each other on their everyday lives.
Answer:
D
Explanation:
mathematical and calendar system
The articles of confederation were documents that signified the first "constitution". It outlined the rights they hoped would be granted to the nation when it would be born.
The answer is B because factories could not pay workers, so they closed many.
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