The principles of classified supervision are as follows: first, adhere to the risk management ability as the core, take supervision measures as the guidance, and take into account the company's market influence; Second, adhere to collective decision-making, make the evaluation work open and transparent, and maintain the fairness, openness and justice of classified evaluation; Third, adhere to the combination of classified evaluation and daily supervision, strengthen supervision to promote company self-discipline and promote the steady development of futures companies. So options a, b and d are all correct.