Passage Summary: A skeptic argues that if this herbal tea actually worked, everyone would be drinking it to get over their colds. Since plenty of people aren't drinking it, it must be a dud.

Conclusion: The new herbal mixture is not an effective remedy for the common cold.

Reasoning: If the mixture actually worked, everyone with a cold would use it because they want to get better; since many people do not use it, it cannot be effective.

Analysis: The skeptic's argument relies on a very high bar for 'effectiveness'—the idea that if something works, it will be universally adopted. To make this logic hold, the skeptic must assume there are no barriers to using the remedy. They assume people know about it, can afford it, believe it works, and have access to it. Since this is an 'EXCEPT' question, four of the answers will be these necessary links, while the correct answer will be a statement the argument doesn't actually need, such as a claim about other remedies or irrelevant details about the plants themselves.