阅读以下段落，回答问题：
The evolution of e-books has reshaped the publishing industry, though its impact on reading habits remains a subject of ongoing study. Advocates of e-books highlight their convenience—portability that allows users to carry hundreds of titles at once, adjustable font sizes for accessibility, and lower production costs that often translate to cheaper prices for readers. They also note environmental benefits, such as reduced paper consumption and carbon emissions from printing and transportation. Critics, however, point to potential drawbacks: increased screen time that may cause eye strain, the absence of tactile reading experiences (like flipping pages or marking margins) that many readers value, and concerns about long-term retention of information. Some research suggests that readers of print books tend to recall details and engage more deeply with content compared to those using e-readers, though this finding varies across age groups and genres.
It can be inferred from the passage that the author believes:A. E-books are superior to print books in environmental protectionB. Print books are more effective for information retention in all casesC. The impact of e-books on reading habits is fully understoodD. E-books’ lower cost is the primary reason for their popularity
解析：本题考查基于文本的推理判断能力，核心是区分 “原文明确信息”“合理推断” 与 “过度绝对化表述”，避免因信息片面或逻辑混淆误选。
- 关于选项 A：原文明确提到电子书 “environmental benefits, such as reduced paper consumption and carbon emissions”（环境优势，如减少纸张消耗和印刷运输产生的碳排放），而未提及纸质书在环保方面的优势，由此可合理推断作者认为电子书在环保层面优于纸质书，该选项符合推理逻辑。
- 关于选项 B：原文指出 “some research suggests that readers of print books tend to recall details… compared to those using e-readers, though this finding varies across age groups and genres”（部分研究显示纸质书读者更易记住细节，但该结论因年龄和体裁不同而有差异），选项中 “in all cases”（在所有情况下）属于绝对化表述，与 “varies across…” 矛盾，故排除。
- 关于选项 C：原文开篇即说明电子书对阅读习惯的影响 “remains a subject of ongoing study”（仍是持续研究的课题），与 “fully understood”（完全明确）直接相悖，排除。
- 关于选项 D：原文仅提到电子书 “lower production costs that often translate to cheaper prices”（更低的生产成本常带来更低售价），但未提及 “lower cost is the primary reason for their popularity”（低价是其流行的主要原因），“primary reason” 属于无依据的过度推断，排除。
答案：A