All Sensory Systems Process Information as Action Potentials, So How

All sensory systems process information as action potentials, so how are different stimuli recognized as different sensations?

A) The strength of the stimulus determines how it is interpreted by the central nervous system.
B) Action potentials are combined in the brain.
C) Sensory cells respond to only one type of stimulus.
D) Action potentials arrive at different parts of the central nervous system.
E) The strength of the stimulus determines the type of sensation.