Final answer:
You should try to escape from a sinking car as soon as possible for the best chance of survival. The most urgent actions are to unfasten your seatbelt, open a window, and exit quickly. CPR should be performed after someone is rescued from water and is on stable ground.
Therefore, option 1) is correct.
Step-by-step explanation:
If your car sinks quickly, you should try to escape as soon as possible. Waiting until the car has completely sunk can dramatically decrease your chances of survival due to increased pressure making it harder to open doors and the risk of becoming disoriented in the water. Once the car is submerged, it becomes very difficult to escape. When the water level reaches your waist, the situation is already critical, and waiting for a rescue team could be fatal, as they may not arrive in time.
It is crucial to remember that in a situation of a sinking car, every second counts. Therefore, action must be taken quickly to ensure the highest chance of survival. The immediate goal is to unfasten your seat belt, open the window, and leave the car as rapidly as you can.
In the context of rescuing someone from water, it is important to remove the person from the water prior to attempting CPR because CPR is ineffective in water. Once on stable ground, CPR can be administered successfully.