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 elimination mechanism by which the dehydration of its major product occurs necessarily involves the abstraction of an acidic hydrogen and displacement of the leaving group. The catalyst in this reaction itself is regenerated from the deprotonation of water in its final step, which results in the conversion of its intermediate, an alkoxide. An aldehyde or ketone had originally undergone a nucleophilic-addition-type process to produce that alkoxide, which had converted it from a nucleophilic enolate using a hydroxide ion catalyst. Producing a final product known as a beta-hydroxyaldehyde, FTP, name this condensation reaction whose name combines that of its two final products.
[A]: Science

[Q]: The beneficial type of this concept would be produced by such factors as the development of an AIDS vaccine, a better educational system, or a more efficient highway system. Costs of this type are not factored into the GDP; therefore, the GDP overstates economic welfare. FTP, name this economic concept in which a third party is affected by production or consumption of a commodity.
[A]: Social Science

[Q]: battle fought at the capital of this former polity resulted in the deaths of both Gordians, ending their rebellion against Maximinus Thrax, and long after the fall of this polity, its capital was razed by forces under Hasan ibn al'Numan, who besieged a force here under John the Patrician and Tiberius Apsimarus. This polity featured a military tribunal known as the One Hundred and Four, and an earlier siege of its capital saw the capture of its citadel, the (*) Byrsa, and a final stand at the temple of Eshmoun. Its forces were defeated at the Battle of Himera by Gelon, and it was victorious at the Battle of The Saw to fight off a revolt under Spendius and Mathos in the Truceless War, also known as the Mercenary War. A kingdom that shared its capital fell after the battles of Ad Decimum and Tricamarum, leading to the deposition of Gelimer the Vandal. Mago and Hanno the Navigator were subjects of, for 10 points, this empire, which had victories at Lake Trasimene and Cannae while fighting the Second Punic War against Rome.
[A]:
History