Answer:
B. Diffusion of responsibility
Explanation:
Diffusion of responsibility refers to the phenomenon whereby an individual is less likely to take responsibility for an action/inaction because he believes since others are present they are the ones responsible.. Under this sociopsychological phenomenon therefore, the individual assumes others should take action private responsive for taking action and might have already done so.
Nomadic people like mongols, huns, and khitans
Im pretty sure the answer is A but somebody check me if im wrong
I would also choose social insurance program which is C for a number of reasons because It makes the most sense
C probably if not then sorry