I have no burglar bars, no gun under the pillow, but I have the same fears as people who do take these precautions, and my windowpanes are thin as rime, could shatter like a wineglass.
What is the author's purpose in including these details in the subplot?

FTo show that the narrator is much braver than the characters in her story
G To describe the way people behave in real life, as opposed to in stories
H To explain why the narrator is more fearful than the characters in her story
To show that the narrator shares the fears of the characters in her story