Avis - Avis Car in MIA

What should I expect to rent from Avis in Miami International Airport for the Full-Size or the Premium classes?
Is the Impala LTZ considered a full-size or premium car?
Do I get to choose my car in the selected class or is it selected by the people at the counter?

What should I expect to rent from Avis in Miami International Airport for the Full-Size or the Premium classes?
Is the Impala LTZ considered a full-size or premium car?
Do I get to choose my car in the selected class or is it selected by the people at the counter?

you've asked this same question in multiple forums now. please stop.