Which of the Following Is the Best Definition of Proxemics

Which of the following is the best definition of proxemics?

A) the subjective feeling of being overstimulated by a loss of privacy
B) social situations that tend to provide immediate rewards for actions that will have undesired effects in the long run
C) the systematic study of the human use of space, particularly in social settings
D) the study of how machines and work environments can be designed to be compatible with our sensory and motor capabilities