Answer:
B. Jekyll
Step-by-step explanation:
The given quote is from the 10th chapter of the novel Strange Case of Dr. Jekyll and Mr. Hyde by Robert Louis Stevenson. This chapter is called Henry Jekyll's Full Statement of the Case, consisting of Jekyll's letter to Utterson, in which he explains the two sides of his character: he loves being respectable and dignified, but the other side of him craves pleasure and debauchery (which is what the quote refers to). He tells about the potion he had been using to switch to Mr. Hyde and back and about the times those transformations occurred. In the end he expresses uncertainty about his own future, as Hyde began taking control of him more and more.