❓ คำถาม According to the passage, which of the following is a key challenge in valuing ecosystem services?
- A. A. They are often considered as private goods with well-defined markets.
- B. B. Their benefits are easily quantified using objective scientific methods.
- C. C. Many are public goods, leading to undervaluation in conventional markets.
- D. D. Their cultural services are more important than regulating services.