A Virgule is a slash or stroke (/) and the two vurgules in the above excerpt are used as substitutes for the word 'or' to establish that either of the words or phrases are fine to use.
For instance, "my flash on the newsprint" or "my flash on the face".
Another instance, "she could have been Obachan back then" or "she could have been Obachanor just after the camps".
The correct word from the excerpt from Poe’s "The Fall of the House of Usher." that could be used to argue that the narrator is unreliable is the last option among the choices is: “Overpowered” suggests the narrator’s lack of control.
