Actually, I would say all tanks are A: 3 D: 2 but you can combine it with an infantry for it to D: 3 if they are American, Russian or German. Potentially British.
Italy, ANZAC, Japan and France would not be able to combine these.
It’d be more in line with BLITZKRIEG since Germany could combine an infantry iwth a tank, and a tank with a tactical bomber for extra punch on offense and defense, more akin to what they actually did.