Match the Definition with the Term

Match the definition with the term.
-the power (Stevens's) law

A) capable of expressing psychophysical relationships when subjective intensities in-crease at a faster rate than physical intensities
B) proposal that the retina contains three different kinds of light-sensitive receptor cells,each one responding most strongly to light waves of one of the three prima-ry colors
C) states that the subjective intensity (S) of a stimulus measured in jnd units is pro-portional to the logarithm of its physical intensity (P) times some constant (k)