Which of the Following Is a Similarity of Perspective for Systems

Which of the following is a similarity of perspective for systems theory and conflict theory?

A) There is an assumption of value-consensus of all parties within the system.
B) There is a supposition that societies are static and unchanging.
C) There is an affirmation that different aspects of society are interrelated and interdependent.
D) There is awareness that institutions or groups within a system may focus primarily on their own self-interests, thus causing tensions and strife.
E) None of the above.There are no commonalties between systems theory and conflict theory.