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.
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Question: This man reformed the fyrd militia system so that it fought in shifts, allowing for the creation of a standing army without disrupting agriculture. In addition to establishing the burhs system of forts, this man built a secret military base on the swamp island of Athelney. This mans advisors included Bishop Asser, who wrote an early biography of him. This author of the so-called doom book won control of all territory west of Watling Street when he won the Battle of Edington against Guthrum the Old. Apart from translating many religious works into English, he is best known for ending the Danegeld. For ten points, name this King of Wessex, the only English monarch with the epithet the Great.

Answer: History

Question: In this country, the execution of Auguste Chapdelaine caused France to enter a war that began with this country's seizure of the merchant ship Arrow. A man claiming to be the younger brother of Jesus established the Heavenly Kingdom in this country, which is where the Eight Nation Alliance put down a revolt led by the Society of the Righteous and Harmonious Fists. This country was the site of the Opium Wars and the Taiping and Boxer Rebellions. For 10 points, name this country ruled during the 19th century by the Qing Dynasty.

Answer: History

Question: This element was first observed by Jules Janssen during the solar eclipse of 1868. It can be used to detect small leaks in high pressure containers, but its most common application involves cooling superconducting magnets in MRI scanners. As temperature approaches absolute zero, this substance forms a Rollin film, enabling it to creep along surfaces as a (*) superfluid. It's also mixed with nitrogen and oxygen as a breathing gas for deep-sea divers, and because sound propagates faster in gases with low molecular weights, inhaling this gas can increase the pitch of one's voice. For ten points, name this noble gas, the second most abundant element in the universe, which has an atomic number of 2 and chemical symbol He.

Answer:
Science