The correct option is B Providing an explanation for the view of Kings speech that is expressed by the author of Passage 1
"The edifying universality of those four words who hasn't dreamed, and who cannot identify with people whose dreams of a better world are punished with violence helps to explain their durability." - this statement from the passage serves to explain how people view King's speech and the reason for its 'durability'. Thus B is the best answer. The other options are incorrect as they do not fit the context.