❓ คำถาม According to the passage, which of the following best explains why the economic value of pollination is difficult to assess?
- A. A. Pollination is a supporting service that operates too slowly to measure.
- B. B. The benefits of pollination are indirect and not captured in market prices.
- C. C. Pollination only affects wild plants, not agricultural crops.
- D. D. Economists lack any methods to estimate the value of pollination.