Studies show that children who regularly eat breakfast perform better academically than those who skip it. Therefore, schools should implement mandatory breakfast programs to improve student grades.

✓ Correct Answer: Option A

The argument assumes that eating breakfast *causes* better academic performance. Option A questions this by suggesting a common cause (supportive parents) for both eating breakfast and better academic performance, rather than a direct causal link between breakfast and grades. This exposes a potential third-factor assumption.