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.

[Q]: Lin and Shu proposed the density-wave theory to explain how the structure of these entities is sustained. The most accurate method for measuring the distances to distant ones uses a relation between their maximum rotational velocity and absolute magnitude, which is known as the Tully-Fisher method. They are generally blue because of their high content of old stars, and one type of them features arms that emanate from each end of a namesake structure. They have discs like the lenticular type, but contain much more angular momentum than the elliptical type. FTP name these galaxies, some of which are barred, including the Milky Way.
[A]: Science

[Q]: opera's third act opens with a shepherd boy singing "Io de' sospiri. " One character in this opera retorts with the aria "Mi dicon venal" when asked what his price is. Another character in this opera sings about how brightly the stars used to shine after he trades his ring to his captor for the chance to write his lover one last letter. That character is killed by a (*) firing squad that he thinks will be shooting blanks after withstanding a session in a torture chamber and refusing to give up the political prisoner Cesare Angelotti. The title character of this opera sings about her good deeds and her dedication to her art in the aria "Vissi d'arte," before she kills the police chief Scarpia and jumps to her death after the execution of the painter Mario Cavardossi. For 10 points, name this Puccini opera about a singer.
[A]: Fine Arts

[Q]: The speaker of a poem by this man advises the reader to "drop thy still dews of quietness / till all our strivings cease" and asks the "still, small voice of calm" to "speak through the earthquake, wind, and fire". His hymn "Dear Lord and Father of Mankind" was adapted from a poem containing the line "Behold the drink of the gods!" He wrote a poem in rhyming couplets which describes the lowering of forty objects displaying "silver stars" and "crimson bars" and relates a scene in (*) Frederick town. One of his poems describes a family reading the almanac on a gray December day, while another tells of a woman who tells some Confederates "Shoot, if you must, this old gray head / but spare your country's flag". For 10 points, name this Fireside poet who wrote "The Brewing of Soma", "Snow-Bound", and "Barbara Frietchie".
[A]:
Literature