Which theme is evident in this excerpt from alfred lord tennysonís narrative poem ñthe charge of the light brigadeî?

ñforward, the light brigade! î
was there a man dismayed?
not though the soldier knew
someone had blundered.
theirs not to make reply,
theirs not to reason why,
theirs but to do and die.
into the valley of death
rode the six hundred.

a) the folly of ambition and greed
b) the inability of humans to face death
c) the heroism of unquestioning
d) the futility of obedience