The lesson that readers might learn about human behavior during times of crisis from "The Masque of the Red Death" is:
A. People often deny reality and continue with their routines.
In Edgar Allan Poe's story, the characters attempt to avoid the inevitability of the Red Death by isolating themselves in a lavish party, demonstrating a denial of the harsh realities surrounding them. This reflects a common reaction in crises where individuals may ignore or downplay the threats in order to maintain a sense of normalcy and comfort.