The kids like to play games, play is the verb games is the subject or kids one of those two so yes it is a sentence
The answer is B because when the character loses their nose, they are forced to re-think how people will treat them.
C. Germany's attack on Russia was similar to betraying all the rules of civilization.
Russia's intention was clearly aimed at making peace with Germany, otherwise they would not have signed the peace treaty. The fact that Germany then turned around and broke that treaty because of how horrible their leaders were, shows that they were not following established rules of civilization.