The correct answer that would best complete the given statement above would be the third option: HOPEFUL. The introduction of the boy advances the plot of Daly's "Sixteen" by making the narrator feel hopeful. This was the time when the young male skater made the narrator feel more joys more than ever and that this boy made her feel hopeful for days. But in the end, the narrator realized that he will never call her at all. Hope this answer helps.
