Which Study Would Constitute One That Is Psychophysical

Multiple Choice

Which study would constitute one that is psychophysical?

A) studying the mechanisms by which auditory receptors transduce sound
B) studying the differences in the physical properties of the sound waves produced by a guitar and a violin
C) determining the smallest amount of sugar to add to a glass of water such that a person will report tasting something sweet
D) asking participants to report on their feelings as they stare at an abstract painting