How does the author develop the idea that the Cuban treefrog threatens Florida's ecosystem and biodiversity?
A. The author describes the treefrog, notes the treefrog's qualities, and how it affects wildlife habitats.
B. The author describes the differences between the Cuban treefrog and native treefrogs.
C. The author describes the treefrog, where it can be found, what it looks like, and how it is an inexpensive pet.
D. The author describes the impact that treefrogs have on many of the ecosystems on Caribbean mainlands.