Repeated blending made the surface look shiny and worn. What is the main cause?

Correct answer: Excessive scrubbing and repeated manipulation

The governing concept is surface preservation during painting. Repeated brushing and scrubbing disturb or compress the paper fibres and can remove surface texture, producing a polished, shiny, worn patch. The correct response is to plan the transition, use sufficient but limited strokes, and let layers settle before revisiting them. A pure colour, small brush, or light paper does not by itself create this damage. Hence option B is correct.