According to the Authors of Your Text,introspection Is Not a Useful

According to the authors of your text,introspection is not a useful source of information about the self because people

A) are driven by unconscious self-enhancing motives.
B) are quite accurate in understanding their own behaviours.
C) cannot be at once the observer and the object observed.
D) actually spend very little time thinking about themselves.
E) know that introspection uses up valuable cognitive resources.