What kind of edge is generally produced in the wet-on-dry technique?

Correct answer: A clear and controlled edge

Wet-on-dry means applying wet paint onto a dry surface. Because the surface is not already carrying water, the pigment spreads less freely and the boundary remains relatively sharp, clear and controllable. Thus option C is correct. A highly spread or blurred edge is more associated with wet-on-wet work, while a completely invisible edge is not the normal result.