A general response would be M.A.I.N. (Militarism, Alliances, Imperialism, and Nationalism). As each major European power had practice such ideas and ultimately lead them to into battle with each other.
However to put (M.A.I.N) in context, upon the assassination of Archduke <em>Archduke Franz Ferdinand</em> by Serbian separatist, which ultimately lead to the Austria-Hungarian Empire declaring war against Serbia. However, Serbia had an alliance with Britain, France, and Russia (Allies). Whilst, Austria-Hungary had alliances with the Ottoman Empire & Germany (Central Powers). Which subsequently enacted every major European power to declare war on the basis of their alliance's agreement.
The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. In June 1914, a Serbian-nationalist terrorist group called the Black Hand sent groups to assassinate the Archduke.
The correct answer to this question is letter "d. free market economy." India followed the principles of a <span>free market economy</span>, which allowed some aspects of society to be controlled by the government, while others were not. Hope this answer helps to answer your question.
What type of question is this man. WW2 had more than 805 million people killled. Russia being the most deaths. We would be here all day talking about this.