Which example of a rhetorical device in Mandela's address is most effective in adding a lyrical quality as well as presenting listeners with divisive contrasts? Click here to reference Nelson Mandela's Nobel Prize address.

a. By acknowledging differences between the subjects listed in paragraph 5, the speaker better prepares listeners for his reasoning on these topics.
b. By offering thanks and congratulations to others in paragraph 2, the speaker sets an amiable tone for his audience.
c. By using a "neither-nor" form of reasoning (paragraph 14), the speaker presents a common fallacy in reasoning, thus sidetracking listeners toward other legitimate causes and solutions.
d. By beginning each sentence of his conclusion (paragraphs 38-40) with these repeated words, the speaker assists his audience in remembering the summary of his speech.