Which of the following are true about the world system theory?

A. It is influenced by the Marxian idea of accumulation of wealth

B. On the basis of wealth accumulation, the world is divided between 'core', 'periphery' and 'semi-periphery'

C. It involves important concepts like players, strategies, rules and outcomes

D. It analyses the situation of conflict, competition and cooperation among states

Choose the correct answer from the options given below: