TASK DEFINITION: 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.
PROBLEM: Iannis Xenakis used eight so-called "sound complexes" in a solo work for this instrument called Nomos Alpha. Six beats on the body of these instruments begin the main theme in Arvo Part's orchestration of Fratres for twelve of them. An ensemble consisting entirely of these instruments was founded in the 1970s by twelve members of the Berlin Philharmonic. The first of Villa-Lobos's Bachianas Brasileiras was composed for (*) eight of these instruments, while Jacqueline du Pre popularized Edward Elgar's concerto for it. J.S. Bach's six unaccompanied suites for this instrument were famously recorded by both Mstislav Rostropovich and Pablo Casals. For 10 points, name this instrument played by Yo-Yo Ma which joins two violins and a viola in a string quartet.

SOLUTION: Fine Arts

PROBLEM: A character created by this author socializes with Billy through sex with Billy's sister Trudy. In a story by this author, one character achieves masculinity by shooting a lion right before he is shot by his wife; that story features a triangle between Margot, Wilson, and Francis Macomber. His works often feature the theme of "nada" and follow the iceberg theory in omitting detail. He created a character who escapes the battle police and falls in love with Catherine Barkley, and he quoted Gertrude Stein on the Lost Generation for one novel's epitaph. For 10 points, name this writer who created Frederic Henry and Jake Barnes in A Farewell to Arms and The Sun Also Rises.

SOLUTION: Literature

PROBLEM: In physics, this term refers to an even-dimensional system of differential equations in which the generalized momenta are proportional to the derivative of a certain function with respect to the generalized velocities, and vice versa. This adjective describes a non-abelian group whose subgroups are self-conjugate. The Bondy-Chvatal theorem and the Dirac theorem both give conditions necessary for a graph to be described by this word, while an operator named by this word is the Legendre transform of the Lagrangian. For ten points, identify this word which in physics describes an operator that is the sum of the potential and kinetic energies and in computer science a path on a graph which visits every vertex exactly once.

SOLUTION:
Science