What evidence from the novel the war of the worlds supports the theme that humans are too vain and shouldn't take their safety for granted?

a. "we must remember what ruthless and utter destruction our own species has wrought, not only upon animals, such as the vanished bison and the dodo, but upon its inferior races."
b. "the martians seem to have calculated their descent with amazing subtlety — their mathematical learning is evidently far in excess of ours — and to have carried out their preparations with a well-nigh perfect unanimity."
c. "it required a certain amount of scientific education to perceive that the grey scale of the thing was no common oxide, that the yellowish-white metal that gleamed in the crack between the lid and the cylinder had an unfamiliar hue."
d. "no one gave a thought to the older worlds of space as sources of human danger, or thought of them only to dismiss the idea of life upon them as impossible or improbable."