Which statement about font choices for educational materials is most accurate?

Which statement about font choices for educational materials is most accurate?

• A. Serif typefaces never aid word recognition in long-form print.
• B. Sans-serif typefaces are never used for headings.
• C. The best font choice is unrelated to age or page design.
• D. Serif typefaces may aid word recognition in long-form print, while sans-serif are often used for headings for readability.

Answer: (D)