​in order to demonstrate the extent to which classical conditioning can be a factor in the development of a serious phobia, john watson and rosalie rayner conducted a study where ______. as. ​a young adult male was taught to fear cashiers in the supermarket
b. ​an adolescent girl was conditioned to fear her school teachers
c. ​a young boy was taught to fear a white rat
d. ​a middle-aged woman was conditioned to fear santa claus