(A) ** militarism
(B) alliances
(C) imperialism
(D) nationalism
EXPLANATIONS BELOW
Concept note-1: -Militarism denoted a rise in military expenditure, an increase in military and naval forces, more influence of the military men upon the policies of the civilian government, and a preference for force as a solution to problems. Militarism was one of the main causes of the First World War.
Concept note-2: -/ˈmɪlətəˌrɪzəm/ noun. Britannica Dictionary definition of MILITARISM. [noncount] : the opinions or actions of people who believe that a country should use military methods, forces, etc., to gain power and to achieve its goals.
Concept note-3: -militarism in American English 2. the glorification or prevalence of such a spirit, attitudes, etc. in a nation, or the predominance of the military caste in government. 3. the policy of maintaining a strong military organization in aggressive preparedness for war.
Concept note-4: -Militarism. the policy of building up strong armed forces to prepare for war.
Concept note-5: -M Militarism-this was where countries built up their armies. Each country tried to compete to build the biggest army. This created a lot of rivalry and tension and it made countries suspicious of each other. They wanted to test their armies and prove they were the best in a war.