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]: This philosopher argued that the only way to exercise freedom is to act morally, because otherwise one's actions are bound by one's conditional desires. This thinker defined the title concept of one of his essays as "man's emergence from his self-imposed immaturity." He postulated that our senses perceive only phenomena and not noumena, so we can never truly know the "thing-in-itself." This author of "What is Enlightenment" argued that we should act only according to maxims that could be made universal law, which he called the "categorical imperative." For 10 points, name this German author of Groundwork of the Metaphysics of Morals and Critique of Pure Reason.
[A]: Social Science


[Q]: Gravitational redshift was measured by Pound, Rebka, and Snider in Harvard's Jefferson Tower using this technique to detect a frequency shift of order one part in ten to the 14th. It can be used for precise studies of the Zeeman effect in nuclei. Iron 57 and tin 119 are two of the isotopes used in this type of spectroscopy due to narrow linewidths in their transitions. Before this technique, the large size of Doppler shifts relative to transition widths made nuclear spectroscopy problematic. It was discovered by its namesake when he was a graduate student at the Munich University of Technology. FTP, what is this effect in which a crystal lattice reduces recoil energy
[A]: Science


[Q]: character in this play tells of a dream in which he had killed hundreds of children while presiding over a ritual sacrifice. Another of its characters remembers working in an electronics store and only communicates through advertising jingles at its beginning. That character recalls his father Frank tearing up an image of the crucifixion, and under the influence of a placebo truth pill he recalls encountering his father at a pornographic film he attends with Jill Mason. While under hypnosis, a main character in this play remembers his childhood encounter with a rider on a beach and the time he bowed to Nugget. In this play, the seventeen year old Alan Strang reveals to the psychiatrist Martin Dysart his belief in the title god and his justification for blinding six horses. For 10 points, name this play by Peter Shaffer.
[A]:
Literature