The answer is B.
Explanation: Rhyme scheme refers to the ordered pattern of rhymes at the ends of the lines of a poem or verse.
In this example,
The first sentence would be rhyme A.
The second sentence would be rhyme B.
Because the third line does not rhyme with A or B, this would make it’s own rhyme, being C.
And the final sentence rhymes with with rhyme B, making it B as well.
You get ABCB