Why we need to follow the phases of exercise in doing such activities?

Why is dante's inferno an example of juxtaposition? a. because dante wrote the story out of anger at having been banished from italian society b. because the story's characters are a mix of ancient figures and people from dante's own time c. because the story takes place in dante's personal vision of the afterlife, and not the accepted one d. because dante used the inferno to speak out against immorality and crimes against common people