Both nationalism and imperialism, along with militarism, were very intertwined during this time, since nationalism created an "us vs. them" type of mentality that led countries to want to take over and occupy more territory.
Because the germans thought it was meant to hurt them and embarres them so hitler use that to his knowledge and told them he would help the germans if they let him become powerful.
Eventho it changed it kind of still is similar at the same time
One issue was religion disagreements. This divided them and affected the people greatly
B is the one that bests explains the caste system. A caste system is when a society divides people in from birth into a pyramid of social class. The higher the person was on the pyramid the more privilage that person had. Furthermore the people from the class above your class were considered your superiors. In the end, B is the only reliable answer.
