Questions 17--20 are based on the following passage about the institutions of EU. You now have 20 seconds to read Questions 17--20. What’s the responsibility of the Court of Auditors

A．Reviews the legality of acts of the Commission and the Council.
B．Oversees long-term investment.
C．Monitors the revenues and expenditures of the EU.
D．Advises the Commission and the Council on general economic policy.