Read the lines from "Do not go gentle into that good night":

"Do not go gentle into that good night,
Old age should burn and rave at close of day;
Rage, rage against the dying of the light.
Though wise men at their end know dark is right,
Because their words had forked no lightning they
Do not go gentle into that good night.
Good men, the last wave by, crying how bright
Their frail deeds might have danced in a green bay,
Rage, rage against the dying of the light.
Wild men who caught and sang the sun in flight,
And learn, too late, they grieved it on its way,
Do not go gentle into that good night.
Grave men, near death, who see with blinding sight
Blind eyes could blaze like meteors and be gay,"

Which statement best describes the effect of the refrains in the poem?

A. They emphasize the idea that people should fight hard to survive.
B. They stress the importance of relationships between fathers and sons.
C. They highlight the idea that death is inevitable.
D. They reinforce the idea that people are insignificant in the vast universe.