I'd meant A to be right in both cases. And of course -- against my own remonstration -- I did none of the math myself. I was unfamiliar with the Templeton data. I looked it up, and it's interesting. I'd note that while Templeton agrees that transit (by the system, not by the fully utilized vehicle) is less efficient than fuel-efficient personal transportation, he still thinks people should make use of existing transit systems.

I ride a bike.