Answer:
A. Black Plague
Step-by-step explanation:
The Black Plague was a devastating epidemic that took place from around 1347 to 1351. The plague was extremely deadly, and it killed an estimated 75 to 200 million people in Europe and Asia. Medieval literature, art and culture was extremely influenced by this catastrophe. As Chaucer wrote The Canterbury Tales during this time period, it is likely that this historical event influenced the story choices of the monk.