which of the following best describes the human skin’s multiple receptive fields that are found throughout the body?
a. clusters of sensory receptors in tiny bumps called papillae
b. areas of skin where stimuli must occur to activate receptors
c. sensitive locations in the skin most sensitive to light stimuli
d. sensory fields in the skin that respond to mechanical stimuli

This question is worded strangely.
So on your body, there are receptors throughout the skin that respond to light touch (Meissner's corpuscle), deep touch (Pacinian corpuscle), pain receptors, and temperature receptors (Krause =cold, and Ruffini = hot). 

Meissner's and Pacinian are mechanoreceptors.
But Meissner's are found in high concentration on thick, hairless skin, like your finger tips and lips. 

If you took a small pencil and had someone poke you with it lightly on different places on your skin, you will find that sometimes you will not feel it. This is because the receptors are not uniform throughout your skin: there are places that lack the receptor. For instance, you'll find that there are more nerve ending on your hands than there are on your back. If you think about it, it makes sense evolutionarily, you do not need to be covered in nerve endings to survive, and too much stimuli would overwhelm the brain.

Papillae on your tongue, which are small bumps that detect taste. 

I am gonna say that it's C: because, in a receptive field there is a high concentration of nerve endings. Consider your lips or finger tips, there are a high concentration of light touch neurons, thus making them very good at distinguishing objects. 

Bis the right answer