What Is One Reason That Invasive Species Such as the Brown

What is one reason that invasive species such as the brown tree snake in Guam are often so successful in their new habitat?

A) They are better adapted to winter conditions.
B) They are unable to full partition existing resources.
C) Potential prey animals have evolved defenses against it.
D) The species has no natural predators to control it.
E) Such a species is typically a Batesian mimic.