"I have a dream"
What is most closely the central idea of the passage below (paragraph 7)?

It would be fatal for the nation to overlook the urgency of the moment. This sweltering summer of the Negro’s legitimate discontent will not pass until there is an invigorating autumn of freedom and equality. Nineteen sixty-three is not an end, but a beginning. And those who hope that the Negro needed to blow off steam and will now be content will have a rude awakening if the nation returns to business as usual. And there will be neither rest nor tranquility in America until the Negro is granted his citizenship rights. The whirlwinds of revolt will continue to shake the foundations of our nation until the bright day of justice emerges.

Answer choices for the above question
A. The nation is in a very urgent moment.
B. Most people hope that this collective anger will end soon.
C. African Americans will continue to revolt until they are granted their rights.
D. The bright day of justice is about to arrive.