What problem occurs if the lit side of a round object and its cast shadow are shaded equally dark?

Correct answer: The lighting relationship and volume will become unclear

The governing concept is value hierarchy. A lit surface and a cast shadow should have a believable difference in value, even when both contain dark areas. If they are shaded equally dark, the light direction becomes difficult to read, the boundary between object and ground weakens, and the round object loses its sense of volume. Therefore, option B is correct. Equal darkness does not make the object shinier, the cast shadow more natural, or the highlight clearer; it removes useful tonal separation.