According to the Parallel Distributed Processing Approach to Semantic Memory

According to the parallel distributed processing approach to semantic memory,

A) concepts are linked together in a chain, and activation can move down that chain while we are thinking about this concept.
B) several patterns of activation can proceed at the same time.
C) when we think about a particular concept, the nonprototypes are activated at the exact same time as the prototypes.
D) each concept is associated with 10-12 stable attributes that do not change.