In the Nineteenth Century, a Psychophysicist Named Ernst Weber Found

Multiple Choice

In the nineteenth century, a psychophysicist named Ernst Weber found that:

A) the amount of change that is necessary for a stimulus to be noticed is systematically related to the intensity of the original stimulus itself.
B) for each stimulus there is an equal but opposite reaction.
C) the ratio between stimulus and response is a fixed proportion.
D) Solomon's law was valid.