Activist: All drugs should be legalized. Despite the current crackdown, the black market has filled the supply, ensuring that people can obtain any drug at any time, if desired. The government currently incarcerates millions of nonviolent drug users at the cost of $50, 000 per year per prisoner. This figure doesn' t even take into account the financial burden placed on the police and judicial system. Legalizing drugs would not only reduce the cost of law enforcement, but the drugs could also be taxed to generate revenue. Which one of the following, if true, most weakens the activist's argument? ['Legalized drugs would be more potent than what currently exists on the black market.', 'Legalizing drugs would increase the number of drug users.', 'Legalizing drugs would raise government healthcare expenditures.', 'Some drugs are more dangerous than others.']