The correct answer to the question is “B”. I eliminated the answer choice “B” because, there is the word “dangerously” in it. In the last paragraph of the passage author clearly refutes the idea of larger animals facing danger by using the words, “it might seem that this interminably”. Moreover, in the last sentence he supports that idea by giving evidence such as it being used only when needed and in whatever quatity it is needed.
I have to confess, I couldn’t find any suitable answer. But is my reasoning here illogical?