What commonality is shared by the three major literary works of the Middle Ages: Dante's Inferno, Chaucer's Canterbury Tales, and Boccaccio's Decameron?

a) The use of historical events and people in fictionalized accounts.
b) The debate about the nature of the individual, salvation, and free will.
c) The motif of the journey used to provide a structure for the story.
d) The focus on the Christian ideas about heaven, hell, sin, and punishment.

Answer: c