What is the law of specific nerve energies?

a. A stronger physical stimulus activates a larger number of sensory neurons.

b. Prolonged activation of a particular neuron weakens its response and leads to a different type of sensory experience.

c. The amplitude and velocity of an action potential determines which sensation it conveys, such as light or sound.

d. Each sensory neuron conveys a particular type of sensation, such as light or sound.