Read the passage. From the Introduction to Frankenstein Night waned upon this talk, and even the witching hour had gone by, before we retired to rest. When I placed my head on my pillow, I did not sleep, nor could I be said to think. My imagination, unbidden, possessed and guided me, gifting the successive images that arose in my mind with a vividness far beyond the usual bounds of reverie. I saw—with shut eyes but acute mental vision—I saw the pale student of unhallowed arts kneeling beside the thing he had put together. I saw the hideous phantasm of a man stretched out, and then, on the working of some powerful engine, show signs of life and stir with an uneasy, half vital motion. Which words in the passage create a dark mood? A. witching hour; pale student of unhallowed arts; hideous phantasm of a man B. my imagination, unbidden, possessed and guided me; bounds of reverie C. show signs of life; successive images; some powerful engine D. with shut eyes but acute mental vision; half vital motion