To determine which conclusion about the speaker's state of mind is best supported by the poem, I would need to analyze specific lines, themes, and emotions presented in the text. However, without the actual poem or additional context, I can't accurately point to the correct answer.
If you can share more details about the poem, such as its themes, tone, or specific lines that highlight the speaker's feelings, I'd be happy to help evaluate the best-supported conclusion based on that information!