❓ 题目 According to paragraph 2, what was the main finding of Robert Paine's experiments with *Pisaster ochraceus*?
- A. A: The removal of the starfish increased overall species diversity by allowing mussels and barnacles to thrive.
- B. B: The removal of the starfish caused a decrease in species diversity because competitively dominant species monopolized the habitat.
- C. C: The removal of the starfish had no significant effect on the rocky intertidal community structure.
- D. D: The removal of the starfish led to an increase in the population of other predatory species.