What is the technique of applying wet paint on wet paper called?

Correct answer: Wet-on-wet

The governing concept is the condition of both the surface and the paint. When wet paint is placed on wet or damp paper, it is called the wet-on-wet technique, so option C is correct. Moisture allows the pigment to travel and blend, creating soft transitions and diffused edges. Dry-on-dry uses a dry surface, while line drawing and printing are different processes.