C is my pick since the name of the bike is associated to an african desert area and will not get outdated. Having the XT designation on the banner may create problems in a few years if Yamaha changes the model # down the road (or sand dune!), the Tenere name should stick for many years however...also if not too late, we need to create a distinctive logo for the site, a great way to advertise \ publicize on a sticker for our hard luggages (ex: ADV, Twisted Throttle etc...)