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.

[EX Q]: Koussevitsky commissioned this man to write his Symphony for Organ and Orchestra. He wrote an opera that opens with the arrival of Laurie Moss' graduation gown. Three ascending notes in the brass open a work by this man that debuted at tax time. He quoted folk songs like "Camptown Races" in a work that incorporates spoken-word readings of texts like the Gettysburg Address. He used themes from the Shaker hymn "Simple Gifts" for ballet choreographed by Martha Graham. Another of his ballets contains a "Hoe Down. " He composed Fanfare for the Common Man and the ballets Rodeo and Billy the Kid. For 10 points, name this composer of Appalachian Spring.
[EX A]: Fine Arts

[EX Q]: Vivaldi wrote 37 concertos for this instrument; the most famous of which is probably La Notte.
[EX A]: Fine Arts

[EX Q]: Instead of employing the Debye-Hull-Scherrer powder method, its namesakes relied on an array of atomic planes. Its namesakes built a vacuum apparatus and employed a hot filament, an accelerating electrode, and an arc-mounted Faraday box. A leak in the vacuum led its namesakes to heat the target, resulting in crystallized nickel, which gave startling results. A plot of collector current against beam energy was explained by constructive interference, and the results in general could be derived by combining Bragg's equation with the de Broglie wavelength for electrons. FTP name this experiment named for two physicists, which proved that electrons diffract.
[EX A]:
Science