In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Example: In one work this author details the life of a tomb-maker who makes extra money by playing the organ at an insane asylum, while another of his novels sees Swartz give a refugee proper documentation only after he tells him his life story in the title Portuguese city. In addition to The Black Obelisk and The Night in Lisbon, he also wrote about Robert and Otto selling their auto workshop and visiting Patrice in a Swiss tuberculosis sanatorium in his novel The Three Comrades, while the turbulent life of the German surgeon Ravic is told in The Arch of Triumph. Another of his novels, The Road Back, is thought to be a sequel to his most famous book, in which the patriotic teacher Kantorek convinces Paul Bumer and his friends to join the Germany Army during World War I. For 10 points, name this German author who wrote All Quiet on the Western Front.
Example solution: Literature
Example explanation: The text is talking about an author and their works, so it belongs to theliterature category.

Problem: To maximize profit, firms should advertise until the ratio of advertising costs to sales revenue equals the ratio of two measures of elasticity of this concept. One variety of this concept is plotted on the y-axis of a Keynesian cross, and the cross-price elasticity of it is the change in it for one good when another's price changes. As income increases, this quantity for (*) normal goods also increases, and Giffen goods are exceptions to the law of this quantity, which states that it goes down when price increases. For ten points, identify this quantity from economics, which is negatively related to supply.
Solution: Science