To be honest they all are great choices but personally I would suggest answer C.
Hope this helps.
Answer: B
Explanation: just did the test.
I believe the answer is C. But I am not quite sure
As with any author's decision to use 1st person, her intention most likely -- in this story -- was to get her readers to go along for the ride into madness and cultivate a certain amount of sympathy for the narrator and her plight. The constant use of "I" puts readers in the narrator’s head and allows them to empathize with her.