Which of the following best describes the reasons why World War I had a profound impact on modern poetry ?

A. The devastation wrought by World War I was so enormous that it put Europes cultural and political norms and values into question.

B. The mechanized killing, which took place on a massive scale during World War I, made it necessary to reflect about the effects of technological progress.

C. World War I was the first global conflict where the distinction between combatants and civilians was erased, and this had a devastating effect on the European psyche.