❓ 题目 According to the passage, why do policymakers often find it difficult to incorporate ecosystem service values into decisions?
- A. A) The total economic value of ecosystem services is too small to matter.
- B. B) The benefits of ecosystem services are immediate and easily measured, while costs are long-term.
- C. C) The benefits are diffuse and long-term, whereas the costs of preservation are immediate and concentrated.
- D. D) Most ecosystem services are traded in markets, making their values obvious.