B if there's room and visibility.

Keep in mind though, you're on a bicycle, not in a car or on a big heavy motorbike, so you also have an option E: hauling your bike up onto the footpath while you're stopped at the light, jazzing the pedestrian crossing button, and switching back over to the bike lane as you cross. If it's a tight or particularly hairy intersection I'll take E every time. It's also a good way to get a green light when there's no traffic around to activate the sensor...