A company executive concludes, 'Our recent employee satisfaction survey, which showed 75% satisfaction among respondents, proves that our new wellness program has significantly improved overall employee morale.' Which of the following, if true, would *most weaken* the executive's conclusion?
✓ Correct Answer: Option B
If only 20% of employees participated, the survey results may not be representative of 'overall employee morale.' This introduces a significant sampling bias, weakening the executive's broad conclusion.