Which of the Following Is Most Likely the Reason the Bird

Which of the following is most likely the reason the bird species of Guam did not coevolve with the brown tree snake?

A) The brown tree snake eats only bird eggs.
B) There was not enough random mutation in the bird species to produce protective traits.
C) The brown tree snake preyed on the bird species too rapidly,not allowing enough time for protective traits in the bird species to be selected for and passed on to the next generation.
D) Many bird species migrated off of the island.
E) The birds did not need to coevolve; the brown tree snake did not pose a significant threat.