C - full-electric is the rage, every brand has one and Tesla remains the 'premium' brand ?
My thinking is that the new vehicle market is quite large, and Tesla, as an early mover, has a great advantage relative to the other manufacturers. Their disadvantage is that they aren't as well capitalized. Their lack of working capital will kill them if they have to pivot very far from their current path, but otherwise it won't be an issue as long as they can scale production with demand.
Currently, you can't buy anything like a Model S from any of the other brands. Further if they start today it will be 24 months before they can launch something. So Tesla has a couple of years of runway, nearly all to themselves, in this space. (Note if you don't think they bring anything unique, I suggest you get a test drive of a model S and then go to Nissan and drive a Leaf) Tesla sells a 'no compromises' electric car, no compromise on range, no compromise on performance, no compromise on comfort, no compromise on quality. And significantly cheaper to fuel up. So that will sell them a lot of cars to people who are attracted to that stance, and those people's followers will get cars because they are followers.
Now it is an open question as to how many total cars that first batch is. Is it 100k, 250k? 1M? That depends on a lot of things. But if electric cars do take off as mainstream, I expect Tesla will be the 'best' one for a while yet.