Categorization tunes the very features perceivers see

Correct: B — Flexibly created and tuned by the categorization tasks the perceiver learns

Classical theories assumed perceptual categorization draws on a fixed vocabulary of features. Schyns, Goldstone, and Thibaut (1998) reviewed evidence that the features themselves are tuned by the categorization problems learners encounter — radiologists develop diagnostic features for X-rays, chess masters develop board-pattern features, infants tune phonetic features to their language. Features, in this view, are not a static alphabet but a flexible product of perceptual learning. The position remains influential: it grounds modern accounts of expertise where what an expert sees differs in kind, not just speed, from what a novice sees.