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.