An even top-to-bottom wash is required but the artist keeps adding water to the brush. What will be the final result?

Correct answer: Later areas will become progressively lighter and more transparent

The governing watercolour principle is pigment concentration. If the artist repeatedly adds water without adding a matching amount of pigment, the mixture becomes increasingly dilute. The first part of the wash contains more pigment, while later strokes contain less, so later areas appear lighter and more transparent. Option D is correct; adding water does not increase opacity or maintain an equal tone. Option C reverses the likely progression described.