He carried a big black brief Case if this isn’t a choice inform me because I have another answer which may be they answer you are looking for if this is not it
I think it is true, but I'm not 100% sure...sorry :/
I would think A is the best answer since cars can't run on anything else on its own and the average home has about 2-4 cars. Not to mention, airplanes, boats, and 18-wheelers for shipping things