Explanation:
Understanding the Demand Curve
The demand curve will move downward from the left to the right, which expresses the law of demand — as the price of a given commodity increases, the quantity demanded decreases, all else being equal.
A document-based essay shows how the theme under discussion relates to the time period of your attention. The purpose of writing it is for you to study the documents your professor gave you to learn and communicate an important idea about history. The writing is evidence founded so it tends to prove a point and for that you need facts and details (option A).
It was the system that caused death among people all around
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