According to the Research on Overconfidence

According to the research on overconfidence,

A) overconfidence can be easily demonstrated in the laboratory,but not in real-world situations.
B) politicians-like other people-are frequently overconfident.
C) overconfidence is limited to decision making; it does not seem to apply to other cognitive tasks.
D) overconfidence seems to apply to about 40% of the population; about 30% are accurate,and the remaining 30% are underconfident.