Philippe Bouchet and colleagues conducted a massive survey of marine molluscs on the west coast of New Caledonia. For 20% of the total species that were located and identified, only a single specimen was found. Which of the following claims about the diversity of molluscs in this area is best supported by the evidence?
A) The west coast of New Caledonia is not an appropriate habitat for molluscs. B) Many of the species from this 20% are probably rare. C) They were not sampling uniformly throughout the area. D) Many of the species from this 20% are most likely just dispersing through the area.