A In a course that offered both formats, students preferred searchable digital chapters for locating definitions and using screen-reader tools, but many chose print for close annotation of long arguments and later recalled the structure more accurately when they had mapped it in the margins. The results do not establish an inherent winner; they show that accessibility needs and cognitive demands differ across tasks. A flexible policy can match format to purpose while teaching students strategies for each medium.
B Print is better for serious reading because screens are distracting. Digital books should be used only when no paper copy exists. The broader principle behind the proposal is compelling even before any local results are examined. The accepted principle supplies an adequate basis for adoption.
C One student scored higher after reading a printed chapter. That result proves print improves comprehension for every learner and every text. The case shows the claimed mechanism operating in practice, not merely in theory. The concrete result makes a broader pattern sufficiently likely.
D Digital files can contain links, while print pages can be turned by hand. Both formats display words and images. This information describes the setting in which the policy would operate and helps readers picture its practical effects. Together, they make the stated outcome seem likely even without a direct comparison.
