570 - Logical Reasoning

Cars are safer than planes. Fifty percent of plane accidents result in death, while only one percent of car accidents result in death.
Which of the following, if true, would most seriously weaken the argument above?

1. Planes are inspected more often than cars.
2. The number of car accidents is several hundred thousand times higher than the number of plane accidents.
3. Pilots never fly under the influence of alcohol, while car drivers often do.
4. Plane accidents are usually the fault of air traffic controllers, not pilots.
5. Planes carry more passengers than cars do.