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]: Several of his early works, including such operas as Cleonice, Demofoonte, and Artaserse, were written with librettist Pietro Metastasio. He had begun composing an opera based on the Song of Roland, but the discovery that Niccolo Piccini was given the same libretto to work on sparked a rivalry in the Parisian press and motivated him to compose Armide. Collaboration with the librettist Calzabigi resulted in the composition of the ballets Semiramide and Don Juan, as well as an opera featuring the "Dance of the Blessed Spirits" and another in whose preface he declared his intent to "restrict music to its true office of serving poetry. " FTP, identify this German classical composer of "reform" operas such as Alceste and Orfeo et Euridice.
[EX A]: Fine Arts

[EX Q]: This artist depicted the remnants of a tree hanging over the edge of a cliff after a lightning strike in Storm in the Mountains, and he showed a man walking toward the titular structure high on a cliff in The Monastery of San Pedro. His former home Olana is now a tourist site, and no single place inspired the setting of Twilight in the Wilderness. Various trips led to many of his works, including The Icebergs and Falls of Tequendama, as well as images of the volcanos Chimborozo and Cotopaxi. For ten points, name this student of Thomas Cole who painted a famous version of some New York falls in Niagara  and an idealized South American landscape in Heart of the Andes.
[EX A]: Fine Arts

[EX Q]: In some cases, zeolites act as a type of these that present molecules at the interface between an aqueous solution and an organic solution. Quaternary ammonium salts are often used as a type of these that help anionic samples dissolve in organic solvents. These compounds, which come in (+) "phase- boundary" and "phase-transfer" varieties, include a heterocyclic carbene bound to a central ruthenium atom in the kind named for (*) Grubbs. Palladium poisoned with lead salts composes the one named for Lindlar. These compounds function by lowering activation energy. Biological examples of these compounds are called enzymes. For 10 points, name these compounds that increase the rate of a reaction.
[EX A]:
Science