Asocial psychologist would study

a. why the leadership in a business is struggling
b. the academic performance of students in high school
c. the link between depression and lack of exercise
d. why people in lines at the grocery store don't talk to each other

D. why people in lines at the grocery store don't talk to each other  

Explanation:

The social psychologist is the psychologist who studies the behavior of people in the context of social norms and rules. The study related to social science correlated to social norms and conditions. It is related to the social environment. Many of the people work in this context of social psychology. The social psychologist study on the cognition, attitude, perception of people towards society. They explain the interaction between small groups. The social psychologist work on self-esteem, perception, respect, and attitude of a perception.  

These all areas related to the study of social psychologist.

answer; /// i believe that the correct answer is(cognitive revolution);

answer; longitudinal;