Which sentence best reveals the writer's beliefs about the impact of beavers on Chilean ecology?
A. Therefore, officials decided that there was only one thing to do: eradicate all of the beavers.
B. This idea seemed cruel to some people.
C. If they are successful, they will be able to solve the problem without harming the animals.
D. The entire incident should teach people a lesson: it is a mistake to mess with nature.