What did young men learn in aztec public schools?

The answer is; 

A) the history of the Aztecs, C) the civic duties of citizens and D) the art of warfare

The league of nations was found in 1919 to keep peace after world war l.but it failed to prevent world war ll in 1939,so in 1945 the nations of the world set up a new organization,the united state (un).since then, the un has encouraged international cooperation and worked to resolve conflict