One thing they can easily do, which once happened to me after being nothing but polite: take your driver's license, walk back to their car, and play on their p

One thing they can easily do, which once happened to me after being nothing but polite: take your driver's license, walk back to their car, and play on their phone for half an hour. I imagine the chances of that would go up with a non-cooperative response. I'm certainly not saying you should spill your guts, but at least being as polite as possible without saying anything incriminating seems sensible.