Answer:
B. Obsession
Step-by-step explanation:
The theme in the dialogue conveys the theme of "obsession," which is primarily a thirst for knowledge. This is the obsession of Victor Frankenstein. He wanted to know the "hidden laws of nature." He feels happy or glad when he comes to know the secrets of nature. This was his natural desire- to know the causes of the happenings in nature.
So, this explains the answer.