Which combination is most important when evaluating a colour blend?

Correct answer: Smoothness of colour transition and purposeful edge control

The governing concept is evaluating both the transition between values or hues and the role of edges. A successful blend moves smoothly without accidental bands, while selected hard or soft edges clarify form, depth, and focus. Thus option A is correct because it combines smooth colour change with purposeful control. The size of the drawing, the price of a brush, or outline thickness alone cannot show whether the blend is technically or visually successful. Inspect the work closely and from a distance.