Which colour relationship is most useful for showing shine on a metal object?

Correct answer: A small, sharp light highlight next to a dark area

The governing concept is strong light-dark contrast, supported by a small, sharp highlight. A bright mark placed beside a dark area imitates the concentrated reflection seen on polished metal, so option B is correct. A uniform mid-tone or equal brightness removes contrast and makes the object look dull. Only soft light colours produce a gentle surface, not a convincing metallic shine.