Complex sentence: It has an edgy, post-grunge sound and started playing on Canadian rock radio in March 2004, at around the same time that the album's lead single, "Don't Tell Me", was being promoted.
Split into simpler sentences: It has an edgy, post-grunge sound and started playing on Canadian rock radio in March 2004. At around the same time that the album's lead single, "Don't Tell Me", was being promoted.