Which idea is king trying to leave his audience with his nobel prize acceptance speech.
a. violence is sometimes the only responds to violence
b. many people hav died in the fight for freedome
c its alright to feel hopeless in the face of despair
d. never give up the fight for freedom, even when it gets difficult

Martin Lurther King Jr is by far one of my favourite historical figures. What he did is very inspirational, and teaches many of us (not only the minority) that we can still make a difference, even in times of difficulty. 
At rechieving his Nobel Peace Prize, Martin Lurther King Jr, delivered a speech that touched many hearts. It was about the fight to freedom.
"...win the racial injustice...I accept...we move with determination...establish a rain of freedom...our children crying out of brotherhood...trying to secure the right to vote...who were brutalized...unrelenting struggle...this movement is [to achieve]...that non-violence is the answer to the political and moral questions on our time...without resorting to violence and oppression...have demonstrated that non-violence...is a POWERFUL moral force..."\
D

I hope this helps :)