A Useful Way to Address the "Problem" That Personalities Tend

A useful way to address the "problem" that personalities tend to change to some degree over time is

A) not to measure personality until adulthood, when personality is more "set."
B) not to measure personality at all.
C) to look for consistent patterns of response which indicate underlying personality stability.
D) to measure personality only once per person.
E) to assume that any change represents error of measurement.