All of the Following Were Long Term Causes of World

All of the following were long term causes of World War I EXCEPT

A) a growing sense of nationalism throughout Europe.
B) the frenzied imperialism that had dominated Europe's thoughts for the past few decades.
C) the growing fear that if one of the European nations did not demonstrate its strength relative to the others, the United States would join the imperialistic jockeying.
D) The fact that a long time had passed since open warfare and the population had forgotten the realities of war.
E) All of the options are correct.