886 - Logical Reasoning

Question: Time and again it has been shown that students who attend colleges with low faculty/student ratios get the most well-rounded education. As a result, when my children are ready to attend college, I'll be sure they attend a school with a very small student population.
Which of the following, if true, identifies the greatest flaw in the reasoning above?

1. A low faculty/student ratio is the effect of a well-rounded education, not its source.
2. Intelligence should be considered the result of childhood environment, not advanced education.
3. A very small student population does not by itself, ensure a low faculty/student ratio.
4. Parental desires and preferences rarely determines a child's choice of a college or university.
5. Students must take advantage of the low faculty/student ratio by intentionally choosing small classes.