The Olfactory Pathway from the Receptors to the Cortex Does

Multiple Choice

The olfactory pathway from the receptors to the cortex does NOT go through the thalamus. This suggests that the:

A) olfactory system evolved earlier than the other sensory systems did.
B) olfactory system evolved later than the other sensory systems did.
C) olfactory pathway came into existence after the thalamus developed.
D) the other sensory systems coevolved with the olfactory system.