Why did the brown tree snake population on Guam increase unchecked

In the last 60 years, brown tree snakes have become the embodiment of the bad things that can happen when invasive species are introduced in places where they have few predators. Unchecked for many years, the snakes caused the extinction of nearly every native bird species on the Pacific island of Guam.

i'd say that the moon rock is about 2.2 billion years old.

the answer is d. exposing corruption in the church