Multiple choice , one question, im quite confused.

1. read the following lines from "the divine comedy."

and as i faced it, it would not retreat, but paced before me and so blocked my way that more than once i had to turn my feet to retrace my steps. it was break of day, the sun was mounting in the morning sky with the same starts as when that whole array of lovely things was first given movement by divine love. the sweet season of the year and the hour made me think that i might try.
which of the following rhyme schemes has the writer used to create a poetic structure?

a) aab bbc ccd
b) aba bcb cdc
c) abb bcc cdd
d) abc bcd cde