In What Way Are Self-Reports of Emotion Often Unsatisfactory?​

In what way are self-reports of emotion often unsatisfactory?​

A) Ratings from different people may not mean the same thing.
B) ​Keeping records of self-reports is difficult and time consuming.
C) ​A change in self-report from one day to the next probably doesn't mean anything.
D) ​Most people give the same rating every day despite differences in how they feel.