National Fullsize Question

[Disneyjosh229]

Just cancelled and rebooked with a NWA WorldPerks promo (gives you triple miles and a double upgrade). Anyways, I am paying the rate for a Compact vehicle, but I am given a "Standard Fullsize" which is considered a Chevrolet Monte Carlo. My question is, when I get to the "Fullsize Reserve", can I take any vehicle on the reserve, or must it be a 2 door one...