The brain can differentiate between each sensory modality because a.the action…

The brain can differentiate between each sensory modality because
a. the action potentials, sent along the same nerve tracts, get sorted by the thalamus.
b. the action potentials for each one are sent along separate nerve tracts.
c. each sense uses different neurotransmitters.
d. each sensory input, passing through the same lines, triggers action potentials in a different pattern.