How Do the Idiographic and Nomothetic Approaches to Studying Personality

How do the idiographic and nomothetic approaches to studying personality differ?

A) The first focuses on the unique characteristics of the individual,whereas the latter looks at how people vary on common characteristics.
B) The first uses objective tests,whereas the latter employs projective tests.
C) The first uses case reports,whereas the latter employs psychobiography.
D) They first relies on quantitative techniques,whereas the latter relies on qualitative techniques.