d) \"Before this I was not unacquainted with the more obvious laws of electricity.\"
Option A is referencing the character of Dr. Henry Clerval. Option B is referencing Professor M. Krempe. Option C is referencing Victor Frankenstein’s monster. And, Option D is actually referencing Victor Frankenstein as can be seen in how what is being discussed is Frankenstein’s non familiarity with the rules of electricity, which he eventually uses to animate (bring to life) his monster/creation.