What Conclusions Can Be Drawn from Jane Lubchenco's Study Involving

What conclusions can be drawn from Jane Lubchenco's study involving periwinkle snails and their algal food sources?

A) Periwinkles eliminated all algae and died out.
B) Periwinkles eliminated all the less-dominant algae species.
C) Periwinkles eliminated the dominant algae entirely.
D) Periwinkles made one type of algae less dominant, which allowed other algae populations to continue.