Answer:
A. "It was about six o'clock as he caught sight of the splendid broken line of hills on which his baby eyes had looked thirty-five years ago."
Step-by-step explanation:
This sentence conveys a nostalgic tone because it describes the protagonist seeing a place from his childhood, and the use of phrases like "baby eyes" and "thirty-five years ago" emphasizes the passage of time and the protagonist's fond memories of the past.