Answer:
B: rhyme scheme
Explanation:
A rhyme scheme is a regular pattern of rhyme at the end of the line of a poem. This pattern is demonstrated by the use of letters (beginning with "A") indicating the lines in a poem that rhyme with each other. For example:
[...] have you any wool ? A
[...] three bags full ! A
[...] one for the dame B
[...] down the lane. B
