❓ 题目 According to the passage, which of the following is a limitation of the contingent valuation method?
- A. A. It relies on actual market transactions, which are difficult to obtain.
- B. B. It tends to overestimate the value of regulating services.
- C. C. It depends on hypothetical choices that may not match real behavior.
- D. D. It ignores the aesthetic and spiritual benefits of ecosystems.