Answer:
The tone can help determine the narrator's perspective. The last answer.
Explanation:
Process of elimination really T-T.
Perspective and tone aren't the same thing so the first answer is wrong. Tone would be the attitude while perspective would be the point of view so the second answer is wrong. Perspective is usually not the opposite of tone, they more likely align so the third answer is wrong. That leaves us with the last answer which is true.