I would be able to tell you if you posted the passage. Anyways, I would say A is the answer.
In this excerpt <u>the speaker expresses his frustration with the fact that even though he doesn't understand the language in which the tune is being sung, he still wishes to comprehend the message</u>. He wants to understand what the singing solitary reaper is singing about.
The conflict here is that they don't speak the same language.
We can see it more clearly in this verse: "Will no one tell me what she sings?" (he doesn't speak the language); and in the rest of the stanza, he keeps on wondering what the song may mean.
Hope this helps!
