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]: The future Byzantine Emporer Romanus II was at one time betrothed to his niece Hedwig, and his son married Theophano, who was either the daughter of the same Romanus II or the niece of John Tzimices. The son of Henry I, Duke of Saxony, he defeated the Magyars at the Battle of Lech in 955 and was crowned Holy Roman Emperor in 962. For ten points, name this founder of the dynasty that bears his name.
[A]: History


[Q]: 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.
[A]: Science


[Q]: A political party named for this was able to get two governors elected in Nevada in the early 20th century. William Hope Harvey's pamphlet Coin's Financial School argued against the "Crime of '73" named for an act that led to sharp decline in the price of this; that decrease led to the passage of the Bland-Allison Act, which ordered purchase of this substance by the US Treasury. That act was superseded by 1890 legislation named for an Ohio senator that increased government purchases of this, but didn't provide for its "free coinage." FTP a "purchase act" named for John Sherman called for US support of what precious metal
[A]:
History