I prefer back on the lead and give them a chance to get over any niggly little injuries or soreness!! Worm out, hydrobath, groom, a bit of free galloping if you can and then yes option "B"!! I'd refrain from putting a dog back on the farm after breaking as you have had it educated and switched to racing mode so IMO I'd rather keep it that way!! I'm not saying that this is gospel, just my humble opinion!!