单选题

Which of the following is least likely one of main purposes of derivative markets?

A、 Reveal prices and volatility of the underlying assets
B、 Improve market efficiency by lowering transaction costs
C、 Enable companies to more easily practice risk management

【正确答案】 B

【答案解析】

B is correct because derivative markets improve market efficiency for the underlying assets by increasing market fairness and competitiveness, not by lowering transaction costs. Low transactions costs are a characteristic of derivative markets, not one of their purposes.