Question

Read this line from the war of the worlds:

This intellectual side of man already admits that life is an incessant struggle for existence.

What does this line tell you about human beings?

A. Though humans are quite intelligent, they do not have much to challenge them anymore

B. Though humans are thoughtful, they waste much time just trying to live day-to-day

C. Though humans love their lives unaware, they do know that they will not live forever.

D. Though humans struggle constantly to survive, they often glimpse times of peaceful thought.

Please help! Thanks in advance!