A teacher reviews student reasoning for this item: A survey of students in an after-school chess club asks whether students like chess. It finds 95% say yes. Identify the concern. Eli: The sample is biased for estimating all students' opinions because chess-club members are more likely to like chess. Farah: The sample is biased because any survey with a high percent must be biased. Gabe: The sample is unbiased because 95% is close to 100%. Which option identifies the student whose correct answer may mask faulty reasoning and gives the best follow-up item?