The introduction of the brown tree snake in the 1940s to the island of Guam has resulted in
A)eradication of non-native rats and other undesirable/pest species. B)the extirpation of many of the island's bird and reptile species. C)a good lesson in biological control. D)a new species of hybrids from crossbreeding with a native snake species. E)its failure to compete with native species and its quick elimination from the island.