Which criterion is most comprehensive when evaluating a brush technique overall?

Correct answer: The technique's relationship with medium, surface, form, light, distance, texture, mood, and compositional purpose

The comprehensive principle is that a brush technique should be judged by its function in the complete visual work, not by an isolated attractive mark. Its suitability depends on the medium and surface, how it describes form and light, how texture and distance are communicated, and whether it supports mood and composition. Option C includes these interacting criteria; the other choices focus on only one narrow feature.