I’m just trying to help so hopefully this did help;-)
C because it’s the answer
Market demand can differet from individual demand. This is, however, often not the case. Groups of individuals usually have a demand for a certain product which in turn cretes what we call market demand. Market demand is simply the demand for a product from a large number of people; the market. And a large number of people is of course composed of individuals.
This means that you may be an individual who created the market demand for certain products, but you don't create it for other products.
This is based on "The Great Gatsby", a novel that was written by <span>F. Scott Fitzgerald. And in this novel, Fitzgerald connects the behavior of the characters to the hottest day of the summer because of the way they acted. They were so heated and are angry that makes this linked to the hottest day.</span>