Answer:
The correct answer choice, or the best one, to the question: What do these lines suggest about the narrator, would be: He feels that people should be contect with that they have.
Step-by-step explanation:
The reason for this being the answer comes from the general feeling and the message that the entire use of words in the passage conveys, as well as from the comprehension of individual words, that show the reader how the narrator interprets the actions and behavior of the man being described.
First, in general, the message conveyed by the narrator through the entire passage is that he sees a man who has become too self-absorbed, and has grown too self-important, because of the things he has been able to acquire. He has cloacked himself with a sense of superiority, and self-importance, that has transformed him. An example from the text: "It made him insolent. He was a man who, prosperity harmed".
Then, we can see through individual words, that this man, aside from superiority, is being sensed as someone who has not had enough, who wants more. The way the narrator speaks about the coat and its pernicious effect, then talking about how too many oats can harm a horse, with the understatement that when a horse gets too many, will ask for more, and become lazy, and will expect always more and more. Then, the narrator says: "So Turkey felt his coat", symbolizing that just as the horse has been damaged by receiving more and more oats, so has this man been affected by the effect of now having such a fine coat, which symbolizes his acquirement of wealth.