Answer:
The correct answer is B) Caste System
Step-by-step explanation:
B is correct answer is because we have many examples of this, for example in Ancient India. Individual who is a member of a certain class usually can't move to other class, as it is strictly forbidden. It is a closed system.
A is not correct as class system isn't always defined by job or even social status. And of course classes can change.
C is not correct as in social system political power isn't always determined.
D is not correct as in the feudal system through war things can change.