Which factor occured in Europe during the 1920's that brought about fascism?

A. A decline in unemployment
B. A focus on national unity and militarism
C. the growth of European economies
D. An increase in agricultural prices

B. A focus on national unity and militarism.

Explanation:

The doctrine of fascist ideology itself rests on nationalism and militarism. Fascism is a form of radical authoritarian nationalism that originated in early 20th century Europe. Influenced by national unionism, the first fascist movements emerged in Italy around World War I, linking typical right-wing positions with elements of left-wing politics in opposition to communism, socialism, liberal democracy, and, in some cases, traditional conservatism. Fascist ideology by doctrine is very close to national socialism. This is one of the reasons why Mussolini was one of Europe's major Hitler allies during World War II.

d) he bring down boss tweed and tammany hall.