Which sentence uses a metaphor to dramatize Dr. King's point vividly?

ABut one hundred years later, the Negro still is not free.

BSo we have come here today to dramatize a shameful condition.

CWe have also come to this hallowed spot to remind America of the fierce urgency of now.

DThis momentous decree came as a great beacon light of hope to millions of Negro slaves who had been seared in the flames of withering injustice.