Benito Mussolini gained power of Italy after WWI
I would say C because its asking about how it is MOST important architecturally and C talks about the architectural styles.
WWII started for a few reasons. first of all, there was a lot of fascism, or radical behavior from a dictator going on in italy. second, the japanese military was invading china and creating issues for them. lastly, hitler was taking over germany and his nazi party was slowly getting more and more out of hand as they gained power.
A. European nations competed for land, trade, and military power.
Explanation: Industrialization and the emergence of bigger and stronger nations had caused competition between each other. The German and Italian Empire were recently established, as for the British and French were old empires with vast amounts of colonies. Austria-Hungary was already unstable and threatened small states in the Balkans which the Russian Empire backed them.