This answer is unsupported. We don’t know whether drainage and retention are the most important factors of good farming. These factors were just given as an example.

This answer is strongly supported. Madden’s criticism of industrialists is that they simplify problems, which in farming results in oversimplification and causes more problems than it solves. This lets us infer that farming problems are better considered as complex, rather than simplified.

This answer is unsupported. We don’t know whether farmers are better than anyone else. Even saying that farmers are better suited than industrialists is making an assumption, because the stimulus never discusses farmers' problem-solving approach.

This answer is unsupported. Saying industrial solutions should "never" be sought is too strong. We only know from the stimulus that these solutions usually lead to oversimplification. There could be some instances where these solutions work just fine.

This answer is unsupported. Madden is not arguing that an industrialist approach to solving problems is “fundamentally flawed.” Rather, Madden is arguing that these approaches are flawed when specifically applied to farming.