Answer:
B
Explanation:
If the poem has a rhyme scheme of abcb then the second and 4th lines have to rhyme.
A. can't be right because Ed doesn't rhyme with blue
B. is right because Lou rhymes with blue and thought doesn't rhyme with red (1st and 3rd lines cannot rhyme)
C. can't be right because blue and Wei do not rhyme
D. can't be right because said rhymes with red and that is not allowed in a abcb rhyme scheme
Therefore the answer is B