What aspect of The Metamorphosis is reflected in this excerpt from "Letter to His Father"

?A. Gregor's confusion at been changed into something resembling a bug


B. Gregor's feelings of pain as he tries to maneuver himself off of the bed


C. Gregor's inability to communicate with his father after Gregor becomes a bug


D. Gregor's curiosity at why his sister does not go into the room with their parents