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 variation in characteristics common to all people.
B) The first uses projective reports, whereas the latter employs case reports.
C) The first uses research methods, whereas the latter employs psychobiography.
D) They employ essentially the same methods but make different assumptions about personality dynamics.