❓ 質問 According to the passage, what was the main finding of Robert Paine's experiments with Pisaster ochraceus?
- A. A) The starfish increased the population of mussels by preying on their competitors.
- B. B) The removal of the starfish caused a decrease in the number of mussels.
- C. C) The presence of the starfish helped maintain high species diversity by controlling mussel populations.
- D. D) Physical factors were the primary determinants of community structure in intertidal zones.