No, no, and no.
It Takes Two is overrated and fully deserving of bonus track treatment. It's the best out of them, but it's still the third worst on the album. It wouldn't even go Top 10, let alone #1. You must know that.
CYB would be a terrible single choice but it would be a GRAMMY worthy song probably. DR wouldn't be good for either. It's essentially a toned-down vocally lacklustre Diamonds by Rih.
Ghost is co-penned by pop ICON Bonnie McKee and it has a big pop chorus, it's more of a mid-tempo than a ballad imo.