All of the lines you've provided contain significant meaning and contribute to the motifs developed in "Romeo and Juliet."
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"He jests at scars that never felt a wound." - This line reflects the theme of love and pain, highlighting how those who have not loved may not understand its depth or the pain it can cause.
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"I should adventure for such merchandise." - This line suggests the idea of love as a pursuit or a worthwhile adventure, which is a recurring theme as Romeo seeks Juliet.
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"Oh, she doth teach the torches to burn bright!" - This line emphasizes the motif of light and darkness, symbolizing the beauty of love amid the surrounding conflict.
Given that all these lines resonate with the various motifs throughout the play, your answer, "All answers are correct," is accurate.