Why does the author provide the information that a number of species of ants "have now established themselves and filled their usual dominant role in insect faunas?" A. To demonstrate that species introduced by humans often disrupt the island ecosystem by replacing endemic species B. To provide an example of some of the most successful colonists of the Hawaiian Islands C. To support the claim that many types of organisms are absent from Hawaii because they could not get there, not because they are unsuited to its environment D. To argue that ants have better powers of dispersal than the 21 orders of insects that are absent from the islands