Why Will You Have a Greater Reaction to Having Cold

Why will you have a greater reaction to having cold water poured all over your back compared to just a few drops of cold water on your arm?

A) Cold water on the back will stimulate a heightened response because it is further away from normal core body temperature.
B) The first example stimulates a larger number of sensory neurons.
C) More sensory neurons exist in your arms and hands than in your back because the former exchange more with the environment.
D) Cold water poured down your back will likely initiate a fight or flight response and cause all of your senses to be heightened, therefore all reactions will be greater in that time.