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]: Her third husband was a farmer who lost his crops to a horde of fairy mice, but they stopped harassing him after he caught one and threatened to hang it. Before she married Manawydan, she had a child by her second husband who vanished from their home and ended up at the court of Teirnon. The daughter of Hefeydd the Old, this lady of the Singing Birds decided that she preferred a lord of Dyfed to her first husband, Gwawl. Considered a version of the horse goddess Epona, she was the mother of Pryderi by the man she loved, Pwyll. FTP, name this figure from Welsh myth who rings like a bell through the night in a song by Fleetwood Mac.
[EX A]: Social Science

[EX Q]: The aristocratic Fourteen Families survived the crash of this country's indigo industry by slavedriving their way into coffee-producing wealth, while its natoional tradition venerates the Pipil warriors who repelled Pedro de Alvorado. Occult enthusiast Maximiliano Hernandez Martinez responded to Farabundo Marti's 1932 peasant uprising in this country by initiating a brutally systematic mass murder of its citizens known as "the slaughter, or la matanza. Roberto D'Aubuisson, the founder of this country's ARENA party, was revealed to be incurably genocidal and implicated in the deaths of Rutilio Grande and Archbishop Oscar Romero. Tensions over the border near the Gulf of Fonseca were ignited by a 1970 FIFA qualifying match, leading this country and Honduras to fight the soccer war. For 10 points, name this Central American country with capital at San Salvador.
[EX A]: History

[EX Q]: In one version of this phenomenon, its namesake conductivity takes on values equal to the elementary charge squared over Planck's constant, a quantity which is multiplied by either a fractional or integral value. Another version of this phenomenon can be used to measure the charge carrier density, since it arises as a consequence of the Lorentz force law applied to those particles. Its namesake quantity is proportional to the product of current and (*) magnetic field, divided by the thickness of the plate and charge carrier density. For 10 points, name this effect in which a magnetic field perpendicular to a current induces a voltage difference perpendicular to both.
[EX A]:
Science