D makes you think that there was a second civil war. MLK was not angry with Lincoln: History had taught him that the Emancipation Proclamation was the first step. D is not true.
Of all your choices, this one could be eliminated the most quickly. The Civil Rights Movement showed that African Americans were anything but wholly satisfied. C is incorrect.
The best answer is B. Sometime when you have a moment read "I have a dream." speech delivered by King.
It wasn't slavery exactly. It was segregation mostly. A is not a good answer: it might work if B was not better.
The answer is B. Slavery ended long before that point, Martin Luther King Jr. spoke up about segregation. So A doesn’t make sense. C doesn’t make sense because MLK didn’t think things were going well, he spoke up because things WERENT going well. D doesn’t make sense either.
A device of effectiveness is Emphasis. The emphasis is the repetition of key words and phrases or the careful arrangement of words to give them special weight and prominence.
It may also refer to the intensity of expression or the stress put on words to indicate their importance or special significance.
It is not true because, if you fully accept it you would protest with it but, if you dont fully accept it then you really dont accept the evil but you put up a front to make it seem like you do.