kojo-no-mai

Hello there, Recently I got hold of this Prunus Incisa "Kojo-no-mai" and I am looking to do something with it. Currently it has three trunks and I am looking into reducing it down to one, but still cannot decide which one to keep. Any advice? Also, is there any possibility to get 3 different...

So I got this prunus from a nursery, did the initial general prune and a bit of wiring and now I'm a bit unsure about what front to select and after that is done wich branches to cut next. My decision is between: a)b) I think in b) we can see the main trunk bend backwards, but in a) I think...