It's D because you're comparing Chicago's tallest building to any other building in the city
Try
<span>A. a dash
because the right side is not capitalized </span>
You didn't provide the unit, however, Romantic poetry often dealt with themes of the beauty of nature, the emotions and the individualism of the speaker. They also showed high subjectivity and mystical spiritual apparitions. In the US, they also incorporated things like death, darkness, and depression, often due to love.
