Passage Summary: A study found that kids who don't see TV ads still love sugary cereal just as much as kids who do, so the ads must not be the reason they like it.

Conclusion: Television commercials do not have a major impact on which breakfast cereals children prefer.

Reasoning: A study showed that children who never watched TV had the same strong preference for sugary cereals as children who watched many advertisements for those cereals.

Analysis: The author assumes that because the preference for sugar exists in the absence of advertising, the advertising itself must be powerless. To weaken this, we need to find a way that the ads are still influencing the kids, perhaps indirectly. Maybe the 'no TV' kids are influenced by their peers who *do* watch TV, or perhaps the ads influence the parents' purchasing habits. Look for an answer choice that suggests a secondary pathway for the advertising to exert its influence, proving that the study's control group wasn't as 'controlled' as the author thinks.