According to Exemplar Theory, Typicality Effects

According to exemplar theory, typicality effects

A) are difficult to explain.
B) reflect the fact that typical category members are probably frequent in our environment and are therefore frequently represented in memory.
C) are produced by the fact that the exemplars in memory for each category tend to resemble each other.
D) should be observed with categories having homogeneous membership but not with more variable categories.