TASK DEFINITION: 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.
PROBLEM: One figure with this name defeated the rebel George Maniakes, and married his daughter to the son of Yaroslav the Wise. Another figure of this name convened the Sixth Ecumenical Council and condemned monothelitism as heresy before being defeated by the Bulgarian Khan Asparukh at the battle of Ongal. One man by this name ruled the Despotate of Morea before overcoming his brother Demetrios to obtain his most famous title, and that figure died anonymously shortly after the death of Giovanni Giustiniani. The most famous figure of this name executed his son Crispus after defeating Licinius. For 10 points, give this name whose most famous bearer crushed Maxentius at the Battle of Milvian Bridge before moving his capital to Byzantium, which he renamed after himself

SOLUTION: History

PROBLEM: The electron dipole moment of this particle is at most three times ten to the negative 26th, and would violate CPT-symmetry if it is non-zero. This particle has a half-life of 881 seconds, and can break up into a proton, an electron and an electron antineutrino via beta decay. This particle is composed of one (*) up and two down quarks, and nuclear fission is initiated by the bombardment of this particle. The number of this particle dictates what isotope an atom is, and they have mass roughly equal to that of a proton. James Chadwick discovered, for ten points, what particle found in the nucleus, which, as its name suggests, has a net charge of zero

SOLUTION: Science

PROBLEM: A journey down this river is the subject of Between the Woods and the Water by Patrick Leigh Fermor. Before flooding due to a hydroelectric project, this river's small island of Ada Kaleh was home to a large Turkish population. In 2000, tributaries of this river were affected by a huge cyanide spill from a gold mine near Baia Mare. This river is home to Europe's largest binational hydroelectric dam at the Iron Gate. A major canal links this river to the Main. The Regen flows into this river at Regensburg, and its other tributaries include the Sava and the Tisza. Before the construction of the Szechenyi Chain Bridge, this river divided the twin cities of Buda and Pest. For 10 points, name this river that flows past Belgrade and Vienna and empties into the Black Sea.

SOLUTION:
Social Science