Opponents of drug laws that forbid using marijuana argue that in a free country, people have the right to take risks with their bodies as long as the people do not cause harm to befall others as a result of taking the risks. This principle leads them to conclude that each person should have the right to decide for him or herself whether to use marijuana.

Which of the following, if true, most seriously weakens the conclusion drawn above?

The rate of overdose fatalities in countries that do not have drug laws that forbid using marijuana is greater than the rate of fatalities in countries that do have such laws.

Unlike cocaine or heroin, there is little evidence, if any, that marijuana is addictive.

A greater percentage of fatal car accidents are caused by marijuana users than by alcohol users.

There is no evidence to suggest that people suffer medical maladies as a result of second-hand marijuana smoke.

Health insurance rates for all people are higher because of the need to pay for the increased medical care users of marijuana require.