What is a rhyme pattern?
A rhyme pattern, or rhyme scheme, is the pattern of rhymes in lines of poetry. They are found at the end of each line.
Let's look at the words at the end of each line in this poem:
- song
- wrong
- span
- man
The ends of line 1 and 2 rhyme (song/wrong) and the ends of lines 3 and 4 rhyme (span/ man)
With this knowledge, your answer is A