In the mid 1980s an agressive strain of algae known as Caulerpa was accidentally introduced into the Meditaranean Sea when a seaside aquarium cleaned out its tanks. The algae conatains a toxin that prevents native herbivores from consuming it. Caulerpa quickly spread over the sea floor, crowding out many species including sponges, corals, sea fans, and lobsters. Which statement explains the most likely impact Caulerpa has had on the biodiversity in the Mediterranean Sea? a The presence of Caulerpa within an ecosystem is an indicator of the ecosystems health. b The spread of Caulerpa improved the habitat for many species of sea grasses, and increased the biodiversity. c Caulerpa inter bread with native species within the same adaptations within the ecosystem. d Caulerpa became dominant within the ecosystem and reduced the biodiversity.