I think that B is going to be very difficult, if not impossible, for Uber/Lyft to overcome. The act of driving is the core business operation for ride-sharing companies; it’s the fundamental means by which they create value. I can’t see a good argument for how that could possibly fall outside of their “normal variety”.
They could potentially argue that their core business is creating a marketplace where riders can find drivers and not the driving itself. That would classify the office workers as employees and the drivers as contractors.
