❓ 题目 According to the passage, what was the most significant implication of Paine's experiments with Pisaster ochraceus?
- A. A) They proved that physical factors are the main determinants of community structure.
- B. B) They demonstrated that predators can indirectly maintain biodiversity by controlling dominant competitors.
- C. C) They showed that mussels are always the most abundant species in intertidal zones.
- D. D) They indicated that keystone species are typically large-bodied animals.