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.

The category of these objects has the property that every morphism is a monomorphism. The spectrum of one of these objects contains one point, and the p-adic numbers for a given p form one of these. These objects necessarily have zero Krull dimension. Those with a finite number of elements have order equal to a power of a prime. Their extensions have a one-to-one correspondence with their intermediates according to the fundamental theorem of Galois theory. A division algebra is one of these without multiplicative commutativity, and can be defined as a ring with multiplicative identity, inverse, and commutativity. For 10 points, name these algebriac structures that include the rationals and reals.
Science

Originally this god was much more malevolent, a god of sorcery who had abducted Xochiquetzal and initiated human sacrifices. Overlord of the constellation Great Bear, he had created the world by tearing apart the primordial crocodile Cipactli, though he lost a foot to her and was thus sometimes called Hurakan. The special protector the god of slaves and punisher of wicked, he saw everything in his magic Obsidian looking glass. FTP name this Aztec god of Magic and the Night Sky, the Lord of the "Smoking Mirror. "
Social Science

One man who was killed under this policy had his writings collected by Aelred Stubbs as I Write What I Like and was the subject of a book by Daily Dispatch editor Donald Woods. Ben Du Toit comes to oppose this policy after the janitor Gordon and his wife Emily are killed in the novel A Dry White Season. A policeman violates the Immorality Law, part of this policy, by dating Stephanie in a novel named for a bird found in a guidebook given to (*) Pieter van Vlaanderen by his father. This policy, which provides the backdrop of Too Late the Phalarope, is violently overthrown in a novel in which the Smales family flees to their servant July's village. For 10 points, Andre Brink, Nadine Gordimer, and Alan Paton wrote about what former system of government-imposed segregation in South Africa

Literature