Read the excerpt from Strange Case of Dr. Jekyll and Mr. Hyde: Strange Case of Dr. Jekyll and Mr. Hyde
by Robert Louis Stevenson (excerpt)

He put the glass to his lips and drank at one gulp. A cry followed; he reeled, staggered, clutched at the table and held on, staring with injected eyes, gasping with open mouth; and as I looked there came, I thought, a change—he seemed to swell— his face became suddenly black and the features seemed to melt and alter—and the next moment, I had sprung to my feet and leaped back against the wall, my arm raised to shield me from that prodigy, my mind submerged in terror.
“O God!” I screamed, and “O God!” again and again; for there before my eyes—pale and shaken, and half-fainting, and groping before him with his hands, like a man restored from death— there stood Henry Jekyll!
What he told me in the next hour, I cannot bring my mind to set on paper. I saw what I saw, I heard what I heard, and my soul sickened at it; and yet now when that sight has faded from my eyes, I ask myself if I believe it, and I cannot answer.

Which common Gothic theme is portrayed in this passage?

A. descent into madness
B. life after death
C. fading beauty
D. science versus nature
E. an obsession with mortality