The most comprehensive and insightful response to your question would be B.
B. The figure represents the Red Death itself, confronting the guests with their mortality. The guests react with fear and outrage, revealing that they view death as something they can resist or control. This highlights their arrogance and disbelief in the power of the Red Death.
This answer captures the essence of the guests' confrontation with the figure, emphasizing their initial fear and outrage, which illustrates their misguided belief that their wealth and isolation can protect them from the inevitable consequences of death. It also reflects the themes of denial and human arrogance in the face of mortality present in Edgar Allan Poe's work.