Why Is Conducting Research in Social Psychology So Challenging

Why is conducting research in social psychology so challenging?

A) Research rarely allows social psychologists to draw conclusions about behavior.
B) Psychologists cannot study common sense because it is rarely expressed in an observable behavior.
C) Research in social psychology relies on self-report data, which is inherently inaccurate.
D) Psychologists are attempting to predict the behavior of highly sophisticated organisms in complex situations.