Which quotation represents a change in pacing? from The Somnambulist

by George MacDonald
"One night I was sitting in my room, devouring an old romance which I had brought from the library." It was late. The fire blazed bright; but the candles were nearly burnt out, and I grew sleepy.
Suddenly I found myself on my feet, listening with agony. Whether I had heard anything I could not tell; but I felt as if I had. Yes; I was sure of it. Far away, I heard a faint cry. Driven by some secret impulse, I flew, without a moment’s reflection, to the door, and stood in the great echoing hall, amid the touches, light and ghostly, of the cobwebs set afloat in the eddies occasioned by my sudden entrance.
A faded moonbeam fell on the floor, and filled the place with an ancient dream-light, which wrought strangely on my brain, and filled it, as if it, too, were but a deserted, sleepy house, haunted by old dreams and memories. Recollecting myself, I went back for a light; but the candles were both flickering in the sockets, and I was compelled to trust to the moon. I ascended the staircase. "Old as it was, not a board creaked, not a banister shook—the whole felt solid as rock." Finding, at length, no more stair to ascend, I groped my way on; for here there was no direct light from the moon—only the light of the moonlit air. I was in some trepidation, I confess; for how should I find my way back? At length, after wandering into several rooms and out again, my hand fell on a latched door. I opened it, and entered a long corridor, with many windows on one side. "Broad strips of moonlight lay slantingly across the narrow floor, divided by regular intervals of shade."
I started, and my heart swelled; for I saw a movement somewhere—I could neither tell where, nor of what: I was only aware of motion. I stood in the first shadow, and gazed, but saw nothing. I sped across the light to the next shadow, and stood again, looking with fearful fixedness of gaze towards the far end of the corridor. Suddenly a white form glimmered and vanished. I crossed to the next shadow. Again a glimmer and vanishing, but nearer. Nerving myself to the utmost, "I ceased the stealthiness of my movements, and went forward, slowly and steadily." A tall form, apparently of a woman, dressed in a long white robe, appeared in one of the streams of light, threw its arms over its head, gave a wild cry—which, notwithstanding its wildness and force, had a muffled sound, as if many folds, either of matter or of space, intervened—and fell at full length along the moonlight. Amidst the thrill of agony which shook me at the cry, I rushed forward, and, kneeling beside the prostrate figure, discovered that, unearthly as was the scream which had preceded her fall, it was the Lady Alice. I saw the fact in a moment: the Lady Alice was a somnambulist.* . . .
*a sleep-walker

quotations around the answer choices