The answer is A. Humans are too vain and shouldn't take their safety for granted.
In both the novel and the radio version of war of the worlds the theme of human vanity is prevalent. It will be the arrogance and stupidity of man that will cause our eventual downfall. We need to be less ignorant as a species and aware of the possibility that we are not alone in the world. Human beings are not all that exist in the vastness of the universe.
