The Island of Guam Traditionally Has Not Had Any Snakes

Multiple Choice

The island of Guam traditionally has not had any snakes that prey on birds;however,brown tree snakes that prey upon birds were introduced.Use your knowledge of wolf-moose population dynamics to determine what happened to the population dynamics of birds and the new snakes on Guam.Which statement is probably one of the results of the snake introduction?

A) Because prey was abundant and few predators existed,snakes spread throughout the island.
B) Snake populations increased exponentially as they preyed upon birds that had no defenses against the predators.
C) As snake populations became very large,they reached the carrying capacity of Guam and caused bird populations to crash.
D) Because bird populations crashed,one of the birds' main prey items,spiders,increased their population size.
E) All of these happened.