Answer:
The reality of war was in stark contrast to the previous beliefs and attitudes Europeans had.
Explanation:
Pre-war Europe included many nations that celebrated their military. To fight was to be honorable and glorious. However, in the Great War, warfare was much more gruesome than previously. The introduction of gas attacks, trench warfare, and other technological/military "improvements" caused lives to be needlessly lost for little to nothing in advancements. During and after the war, people began to realize that it wasn't worth it and the youth suffered terribly.
<span>"c. ethical standards are often overlooked by governments hungry for jobs or tax revenues" would be the best option, since developing countries usually lack the revenue needed to make things like government oversight a possibility. </span>
It means to "be nice to everyone, however, if they don't listen, show them your military power" literally.
I meant that if the easy way doesn't work, then use the hard way
hope this helps