Answer:
B) Us vs. them
Step-by-step explanation:
Us vs. them:-
The mind of the humans are capable to categorize the people into social group which can be based on the gender, age, cultural, regional, nationality status. Upon having such thoughts, these social groups then create Us vs the,m in which there is a constant debate about the actions of these groups.
Hence, according to the question, the fact that the students who don't follow the leads of the Jo considered to be 'outsiders' is an example of Us vs. them.