A local survey found that 80% of residents support the new public library project. Therefore, the mayor should proceed with the project, as it clearly has strong community backing. However, the survey was conducted exclusively at the annual Book Lovers' Fair. Which of the following statements, if true, most clearly exposes a flaw in the argument's reasoning?
✓ Correct Answer: Option D
The argument generalizes from a specific sample (book fair attendees) to the entire community. Option D exposes a sampling bias by explaining why this particular sample is unrepresentative, thus undermining the argument's conclusion about community backing.