How Is the Intensity of a Stimulus Encoded During Information

How is the intensity of a stimulus encoded during information transmittal to the central nervous system?

A) Different second- order neurons transmit information about stimuli of varying intensities.
B) The amplitude of action potentials transmitted to the central nervous system is greater for a stronger stimulus.
C) The frequency of action potentials transmitted to the central nervous system is greater for a stronger stimulus.
D) Different afferent neurons transmit information about stimuli of varying intensities.
E) The neurotransmitter released from an afferent neuron differs based on the intensity of the stimulus.