All of the above hope this helps
The narrator in Frankenstein is Victor Frankenstein. As this paragraph is taken out of context one can only assume that he is the one talking (as the narrator). First person- Person speaking Second person- Person being spoken to Third person- Being spoken about
So looking at this text we can conclude that it a someone speaking so that gives us first person.
Therefore that would make this first person (victor).
Hope I helped! Let me know if you need more help or would like further explanation! :)
A clue to cause and effect would be the word "since" as it starts a cause for something,a reason for something to happen
