B; Boorish means rough or coarse. Chaucer (the author) is saying that the Knight had never been rude, bad-mannered, or mean to another person. He is of high order among the other characters but chooses to be kind instead.
The excerpt from "The Prologue" of The Canterbury Tales that best indicates that the Knight is a humble person is "He never yet a boorish thing had said/ In all his life to any..."
Explanation:
The knight in "The Canterbury Tales" is described as a person who has all the positive attributes a man could have, he is seen as a loyal, generous, refine and honorable person the line has been taken from the complete descriptions that is "He was of sovereign value in all eyes. And though so much distinguished, he was wise And in his bearing modest as a maid. He never yet a boorish thing had said In all his life to any, come what might; He was a true, a perfect-gentle knight."
making an appeal to all for basic human decency in race relations
explaining the oppression black South Africans had faced for decades
showing the parallel between apartheid in South Africa and the Civil Rights movement. All 3 of these points were covered by Nelson Mandela's above speech and that basically he was appealing to all South Africans be they white or black to learn to live together in peace and equitably and renounce the apartheid white racist regime of the past.