Answer:
C - Change.
Explanation:
One of the major study areas of social psychology is change. As the exercise explains, what is mostly studied about this is how to implement it and reduce barriers to it's acceptance. This branch of psychology studies how to contribute in measuring, understanding, building trust; all under the concept of change, which happens throughout our hole lives, as Erikson developed after Freud.
I believe the answer is D) 158. Thanks
