The correct answer is option C, Skinner
Reason -
Skinner is one of the prominent American psychologists who has done extensive research on behaviorism especially human behaviour in terms of response to environmental stimuli. Skinner entered into the field of psychology after getting inspired from Russian physiologist Ivan Petrovich . he received his Ph.D from Harvard university and later joined as faculty in University of Minnesota where he wrote a famous book The Behavior of Organisms