Which combination is most suitable for neat acrylic lettering?

Correct answer: Dry background, suitable brush and even pressure

The governing concept is precision through a stable surface, suitable tool, and controlled pressure. A dry background prevents lettering from bleeding into the underlying coat. A brush appropriate to the letter size holds a manageable amount of paint, while even pressure keeps strokes and edges consistent. Thus option D is correct. A wet background, excess water, an unsuitable broad brush, dirty tools, or irregular pressure can blur edges and make the lettering uneven.