The title is pretty self-explainatory.
Out of all of Ayumi's singles, which song (that was featured as a single) best corresponds with its cover? The songs you may use are songs that were used ONLY for the single! Let me clear that up: Do not pick any B-sides (i.e. Beautiful Fighters or Will) or remixes/recycled songs (i.e. Secret). This also excludes teens from the Startin'/Born To Be... single.
Basically it means that the only song you can pick for the evolution single is evolution, you know? However, you may choose Bold & Delicious AND/OR Pride for said single.
Make sense?
Well, I hope I cleared up everything I had to.
Remember, ONLY SINGLES! NO ALBUMS!! thank you.