I have an intersection like that on my commute as well (but not leading in to a bike lane). I take position C, but if I see a car with a right signal flashing behind me, I tend to pull all the way over and wave them past as it's a long light, and they will generally have the opportunity to turn before the light changes.

I should probably examine position B, but I'm not sure if the lane is wide enough for me to take position B and still let people turn right behind me. If you're not worried about traffic behind you being able to make right on red, then I'd say the correct position is between C and B, right in the middle of the lane. Even position B might confuse people who expect bikes to be on the right hand side of their lane, but I can see why it'd be desirable as a courtesy to the drivers behind you and to prevent a right hook.