i'd say wherever the R&D engineers are, so country A in your example. unless you're talking about "i buy a domestic to support the economy", then its country F.
either that or i dont much like the letters B, C, D, or E.
but i'm just saying, that even though i have a neon, i'm trying to figure out why people like each "division" of cars... and no, i'm not trying to start a import vs. domestic war in this thread. i was just giving an explanation of why i'm in a car forum that i dont own, and am not looking to own the car it's representing.