20 points for the best answer
read the following passage and then answer the question.

“juan she saw, and, as a pretty child,
caress'd him often, such a thing might be
quite innocently done, and harmless styled,
when she had twenty years, and thirteen he;
but i am not so sure i should have smiled
when he was sixteen, and julia twenty-three;
these few short years make wondrous alterations,
particularly amongst sun-burnt nations.”

"don juan." lord byron (1788-1824)

which of the following accurately describes byron's rhyme scheme?
a. ab ab ab cc
b. ab ac ab ac
c. aa bb aa cc
d. ab ab ac ac