Read this passage from Frankenstein: In a solitary chamber, or rather cell, at the top of the house, and separated from all the other apartments by a gallery and staircase, I kept my workshop of filthy creation; my eyeballs were starting from their sockets in attending to the details of my employment

What is most clearly a motif in this passage?
A. The feeling of regret B. A Gothic setting C. the plot's climax D. Unhealthy habits