Rejecting the concept of “S-R” connectionism, further “S-O-R” concept was developed by___________?

– by
Rejecting the concept of “S-R” connectionism, further “S-O-R” concept was developed by___________?

A. I.P. Pavlov
B. C.G. Jung
C. E.B. Titchener
D. Sigmund Freud
E. Woodworth