Read Stanza 4 of "The Raven" below. Which of the following can be used to label the exter- nal rhyme scheme?
Presently my soul grew stronger; hesitating then no longer,
"Sir," said I, "or Madam, truly your forgiveness I implore;
But the fact is I was napping, and so gently you came rapping,
And so faintly you came tapping, tapping at my chamber door,
That I scarce was sure I heard you"-here I opened wide the door;-
Darkness there and nothing more.
A
ABABCC
B
ABCABC
С
ABCBBB