In this task, you are given a text which is the body of a document. You are given a question and options. Pick the correct number. Don't generate anything else apart from the numbers provided in options.

[Q]: Context: Omnipotent Government: The Rise of the Total State and Total War is a book by Austrian School economist Ludwig von Mises first published in 1944 by Yale University Press. It is one of the most influential writings in Libertarian social thought and critique of statist ideology and socialism examining the rise of Nazism as an example. The book treats Nazism as a species of orthodox socialist theory.
Question: The document can be classified to which topic?
Options: 1)Film, 2)Artist, 3)Athlete, 4)WrittenWork, 5)NaturalPlace
[A]: 4

[Q]: Context: Bromus diandrus is a species of grass known by the common names great brome and ripgut brome. This is a brome grass which is native to the Mediterranean but has been introduced to much of the rest of the world. It does best in areas with a Mediterranean climate such as California and parts of southern Australia but it is quite tolerant of many climates. The adult plant is one to three feet in height with hairy rough leaves about a centimeter wide.
Question: The document can be classified to which topic?
Options: 1)Plant, 2)WrittenWork, 3)Animal, 4)NaturalPlace, 5)Album
[A]: 1

[Q]: Context: German submarine U-18 was a Type IIB U-boat of Nazi Germany's Kriegsmarine during World War II. It was laid down 10 July 1935 and commissioned on 4 January 1936. It served in many U-boat flotillas during its service.
Question: The document can be classified to which topic?
Options: 1)Animal, 2)MeanOfTransportation, 3)Building, 4)Artist
[A]:
2