❓ 문제 According to the passage, which of the following is a criticism of the keystone species concept?
- A. A. It overemphasizes the role of physical factors in shaping communities.
- B. B. It is difficult to apply because keystone species are always predators.
- C. C. It may oversimplify complex ecological interactions and is often applied retrospectively.
- D. D. It has been disproven by subsequent research in intertidal zones.