❓ 题目 According to the passage, which of the following is a major problem with methods like contingent valuation and choice experiments?
- A. They are too expensive to implement in most regions.
- B. They rely on hypothetical scenarios that may be biased by respondents' limited knowledge or strategic answers.
- C. They fail to account for provisioning services such as food and water.
- D. They are only applicable to cultural services, not regulating services.