Mediate

to settle an argument
to argue
to become involved in argument

the answer choice that best describes the point of view from which the story is told is the option b. the doctor tells the story from the first person point of view. this is true because in the story of "the siege of berlin" by daudet alphonse it seems like an anecdote but the doctor tells the story with some irony and some patriotic pathos, the doctor tells all that he saw as the attending physician and that makes the narration more realistic as a professional tells the facts and combines the narration with the elements in the story. it's no the option a because it is clear that the doctor tells the story even if at the beginning we start to read about an unnamed narrator who is talking about a visit to champs-elyseés in the company of the doctor. in this case, he is the character who opens the story and introduce the context to understand where the story begins and why that is when the doctor stops at a great corner house and tells the story of colonel and his granddaughter. it's not the option c because the colonel is not telling his story and what happened to him, it is the doctor's words of his appearance, his apoplexy and his life. and finally, it's not the option d, because in this story we can read just the point of view of the doctor as he is the one who told us the story of colonel and he describes the reaction of the girl not her point of view.

he concludes that the removal of american indians will civilize them

i think the answer is b..