One Potential Problem with Surveys and Questionnaires Is That

One potential problem with surveys and questionnaires is that:

A) people may misrepresent their personal characteristics or lie in their responses.
B) random selection procedures are not possible with these
C) for emxps ofectancy data c eollffeeccts usution.allIny incorrecvalitd ate the findings.
D) these techniques produce illusory correlations rather than true correlations.