The principle of working your weaknesses would suggest C.
I was hoping someone would point out that Wall X had just installed an all-singing and dancing system board so I could have a play on it.
Are the holds produced specifically for this type of board? If so are they mirror images of each other or is each hold totally symmetrical?
Paul what have you done to my eyes? Jesus! I hope it's toned down a little in the flesh?
One thing i've noticed recently is not just in the hands but you can look at the foot rubber of your shoes -- at least with mine ive noticed the left shoe noticeably less worn than the right -- either not using or just pushing/pulling hard enough with the non-dominant foot.
The rubber goes first on your strongest leg because you apply more pressure with it, surely? All the above is true but I think that's the dominant factor, definitely is for me. My rubber always goes on my right foot first, my right leg is way stronger than the left.