Question

which of the following was not a cause of world war i?
○ militarism
○ alliances.
○ diplomacy
○ imperialism

Explanation:

The main causes of World War I are often summarized as Militarism, Alliances, Imperialism, and Nationalism (the "MAIN" causes). Militarism (arms race, glorification of military), Alliances (e.g., Triple Entente, Triple Alliance) and Imperialism (competition for colonies/resources) were key causes. Diplomacy is about peaceful negotiation and conflict resolution, which was not a cause of WWI (in fact, failed diplomacy contributed to the war, but diplomacy itself isn't a cause).

Answer:

C. Diplomacy