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: Coombs tests detect these bodies bound to erythrocytes, and a technique that uses these entities is ELISA. These molecules have a namesake fold, in which two beta sheets are held together by amino acid charges. These adaptable molecules can somatically recombine in a process called V(D)J recombination and are also capable of changing isotype by altering conformation of their heavy chains. Like enzymes, they operate via a a so-called "lock-and-key" mechanism, as verified by Linus Pauling. FTP, name these characteristically y-shaped immune molecules exploited in vaccination and produced by B cells in response to specific antigens.

A: Science
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Q: Vivaldi wrote 37 concertos for this instrument; the most famous of which is probably La Notte.

A: Fine Arts
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Q: This person lost a good deal of popularity for supporting the Burlingame Treaty against a piece legislation passed fourteen years after that treatys signing. This leaders first Secretary of State inaugurated the Pan-American Conference and his second proposed a treaty to annex Hawaii. The high degree of legislative spending during this persons administration was used against him in his reelection campaign, in which he was accused of complicity in the Billion-Dollar Congress, which passed the Chinese Exclusion Act and Sherman Anti-Trust Act. This Presidents Naval Secretary was Benjamin Franklin Tracy, his Secretaries of State were John Watson Foster and James G. Blaine, and his Vice President was Levi Morton. For 10 points, name this twenty-third President of the United States.

A:
History
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