An Important Difference Between Categorization Via Exemplars and Categorization Via

An important difference between categorization via exemplars and categorization via prototypes is that according to exemplar theory

A) the standard used in a particular category can vary from one occasion to the next.
B) one categorizes objects by comparing them to a mentally represented standard.
C) categorization depends on a judgment of resemblance.
D) categories are represented in the mind by a single relatively concrete illustration of the category.