The statement about wood platforms and finishes is true.

• A. The statement is true.
• B. The statement is false; coatings may obscure surfaces.
• C. Only edges may be coated; surfaces must be painted.
• D. Edges may be covered or marked for identification; coatings may not obscure the top or bottom surfaces.

Answer: (D)

The key idea is that coatings on wood platforms should not cover the surfaces that come into contact or are visible for inspection, while edges can be treated for identification. Keeping the top and bottom surfaces unobstructed ensures you can verify how the platform sits, check for wear, moisture, or damage, and confirm proper clearance and installation. Edges being marked or covered allows labeling or identification without impacting the function of the main contact surfaces. That’s why the statement that edges may be covered or marked for identification and that coatings must not obscure the top or bottom surfaces is the best choice. The other options either allow coatings to obscure essential surfaces, require painting the surfaces, or state the claim too simply without accounting for the need to keep critical faces visible.