<span>While he doesn't specifically mention slavery in this excerpt then I would say that the answer would be B) by citing the office to which he was elected as it could be said to be ethos as appealing to people's belief that the president has the right to declare war though the obvious purpose of the war is to fight slavery.</span>
Answer:
B, Mark Twain (whose real name was Samuel Langhorne Clemens) is a famous American author.
<em> I hope this helped, enjoy your day.</em>
I would say A. diction is concerned with the word choice within a work, and A is the only answer that focuses on that. B and C discuss places within the story, like the conflict and the climax, and plot structure and diction aren't exactly directly related. D discusses character development, which doesn't relate as closely to diction as choice A.