The Authors of Your Text Described a Study in Which

The authors of your text described a study in which university students kept track of their moods in daily diaries.The results of this study suggest that

A) introspection is an unreliable source of data.
B) people have a great deal of difficulty constructing plausible explanations for their moods.
C) people can fairly accurately identify the causes of their moods.
D) people can accurately predict how their moods will influence their behaviour.
E) if you expect something to influence your mood, your expectation will become "self-fulfilled."