Multi-select problem: How does the next paragraph end?

How to travel safely with your dog in the car
Lock the doors.
In this day and age, most cars have power locks. This translates to a safety risk for smart pets.

Options: 1). To prevent your small dog from causing a potential charge, make sure that there are no others in the car. If you do not lock the doors, your dog may get in the car and potentially seriously injure your dog or you.; 2). Even some dogs can develop anxiety about driving if you keep an eye on them. The worst thing you can do is to stand around, peek behind, or let loose! Think about putting on your seatbelt ahead of time to protect your car from theft.; 3). If your dog unlocks the doors and you're not aware of it, he is then at risk of exiting the vehicle while it's moving. Even if your dog is crated the entire trip in the car, accidents can occur.; 4). This means many drivers are using them as they see fit. If your dog got out of the car, locking the doors should not be an issue.;
3).