If you plan to pick up a rental car at the airport, it's best to reserve a car ahead of time. This is easy to do on the Internet or by phone. When you pick up your car, you will have to show a valid (1)............... that proves you have legal permission to drive. Read the contract carefully and make sure that the (2)............... it states is the same one you were originally quoted. You don't want to have to pay more than you expected. Also remember that certain features, such as stereo systems, are (3)................ You don't have to accept and pay for them if you don't want to.