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]: This organ produces a tetrapeptide, which bonds to macrophage receptors, and is known as tuftsin. The sinusoids of one portion of this organ contain blood and a reserve of monocytes which can be utilized in the case of hemorrhagic shock. The other major portion of this organ contains Malphigian corpsules and synthesizes antibodies. Located in the abdominal region and consisting of red and white pulp, for 10 points, name this organ part of the lymphatic system that helps to filter and clean the blood.
[A]: Social Science

[Q]: One of his books analyzed such documents as a picture of a woman lying on the floor with bent legs in front of a bemused man in a three-piece suit, which this author argued communicated a message even though the text was too blurry to read. In addition to writing Gender Advertisements, he described the procedures for boarding a bus or navigating a crowded elevator in his (*) Interaction Ritual. His major work draws on a theory first developed by George Herbert Mead, symbolic interactionism, to explain the "dramaturgical approach" to ordinary behavior. For 10 points, name this Canadian sociologist who wrote The Presentation of Self in Everyday Life.
[A]: Social Science

[Q]: Recent studies have shown that infectivity of the cytomegalovirus may require this functional group in its free form. It can be qualitatively detected using lead(II) acetate, which produces a yellow solid if this functional group is present. They are oxidized by mild oxidizing agents such as molecular iodine to produce disulfides, and cysteine is unique in that it is the only amino acid to bear this functional group. FTP, identify this functional group from organic chemistry formerly known as mercaptan and consisting of a sulfur atom bonded to a hydrogen atom.
[A]:
Science