(A) militarism
(B) ** alliances
(C) nationalism
(D) imperialism
EXPLANATIONS BELOW
Concept note-1: -Germany’s treaties with Austria-Hungary and Italy would form the Triple Alliance, which became the Central Powers. For this reason, Germany declared war on both France and Russia when Austria-Hungary went to war with Serbia. The Schlieffen Plan failed, making World War I last much longer than anticipated.
Concept note-2: -The Causes of World War One Germany declared war on Russia in support of Austria and on France because of her alliance with Russia. Britain declared war on Germany in support of Belgium and France, and on Turkey because of her alliance with Germany.
Concept note-3: -Germany entered into World War I on August 1, 1914, when it declared war on Russia. In accordance with its war plan, it ignored Russia and moved first against France–declaring war on August 3 and sending its main armies through Belgium to capture Paris from the north.
Concept note-4: -Germany represented a direct threat to British security and the security of its empire. Accepting German domination of Europe had grave implications for British status and survival. Britain went to war in 1939 to defend the balance of power in Europe and safeguard Britain’s position in the world.