Read the excerpt from “The Pobble Who Has No Toes” by Edward Lear. What is the rhyme scheme?

The Pobble who has no toes
Swam across the Bristol Channel;
But before he set out he wrapped his nose
In a piece of scarlet flannel.
For his Aunt Jobiska said "No harm
Can come to his toes if his nose is warm;
And it's perfectly known that a Pobble's toes
Are safe,—provided he minds his nose!"

A.
abcb efgf
B.
abbc dede
C.
abab ccdd
D.
abbc deed