Comparing Felleman and Van Essen's Distributed Hierarchical Model to Luria's

Comparing Felleman and van Essen's distributed hierarchical model to Luria's simple serial hierarchical model of cortical processing, Luria's model suggests:

A) areas at each level are interconnected with one another.
B) the pattern of forward and backward connections determines hierarchical position.
C) some connections skip levels.
D) connectivity in sensory cortex is only from primary to secondary to tertiary.