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]: A maximum independent set for this data structure can be found in linear time by adding alternating levels. In this structure, any two vertices or nodes must be connected by a single simple path, and thus it is connected and acyclic. By using (*) union-find with disjoint sets, one type of this structure containing all the vertices of a connected graph can be constructed. One variety of this data structure can be used to easily implement a binary search. This structure also comes in red-black and self-balancing-binary varieties. For 10 points, identify this data structure from computer science, a hierarchical graph in which "leaf" nodes ultimately flow from a "root" node.
[EX A]: Science

[EX Q]: Thomas McClintock helped chair this meeting, which sparked a National Convention two years later in Worcester, Massachusetts and saw speeches by Samuel Tillman and Ansel Bascom. Newspaper editor Gordon Bennet ridiculed this meeting by publishing its proceedings in the New York Herald, and it was sparked by an extension of the state property tax. This meeting was organized at Richard Hunt's tea table in the nearby village of Waterloo and took place in a Wesleyan church. The Declaration of Independence was modified to form its namesake Declaration of Sentiments. For ten points, Lucretia Mott and Elizabeth Stanton organized which 1848 convention on women's rights
[EX A]: History

[EX Q]: A fossil with fermented grapes in its stomach of an early genus of these animals was found in the Messel Oil Shales. Darwin was astonished to discover a tooth from this extant animal group along  with fossils of Toxodon, noting that Pliocene conditions must have been very different to cause their local extinction. George Gaylord Simpson drew them in a branching evolutionary tree, in contrast to their erroneous (*) anagenetic portrayal. Gould argued that passive diffusion could explain their trend toward increased body size; he also described their inaccurate textbook portrayal in "The Case of the Creeping Fox Terrier Clone," which deals with the genus Eohippus. For 10 points, name these  perissodactyls, whose extant species are all members of the genus Equus.
[EX A]:
Science