This question explores the relationship between the quality of legal journalism and journalists' understanding of the legal system. The text implies that a deeper understanding of the legal system can enhance the quality of legal journalism, as it is a primary subject for journalists. Option A correctly captures this relationship by stating that the quality of legal journalism is directly proportional to journalists' understanding of the legal system. This means that as journalists' comprehension of the legal system improves, so does the quality of their legal reporting. Option B is incorrect because it denies any impact of legal knowledge on journalism quality, contrary to the text's implication. Option C is also incorrect as it suggests that only a superficial understanding is needed, which undermines the importance of in-depth knowledge. Option D shifts the focus to the journalists' network, which, while potentially beneficial, is not the primary factor in the quality of legal journalism as suggested by the text. Therefore, A is the best statement capturing the relationship between legal journalism quality and journalists' understanding of the legal system.