The correct answer should be D. To make the main points more memorable through repetition.
This isn't appealing to ethos because ethos is appealing to credibility. It is questionable whether or not the image itself is memorable or not.
Repetition and parallelisms in speeches are used to make something more memorable and quotable. It is supposed to persuade you and this kind of sentence manipulation enables good diction.
Because the boys back then joined the way and the effort
