As scientists,psychologists adopt an attitude of skepticism because they believe that

A) people are unlikely to reveal what they are really thinking.
B) most commonsense ideas about human behavior are wrong.
C) claims about human behavior need to be supported with evidence.
D) people usually have ulterior motives for acting.

Psychologists adopt an attitude of skepticism because they believe that claims about human behavior need to be supported with evidence. They do not necessarily assume that people are unlikely to reveal what they are really thinking or that most commonsense ideas about human behavior are wrong. They also do not assume that people usually have ulterior motives for acting. Instead, psychologists rely on the scientific method to test hypotheses and gather empirical evidence in order to understand human behavior.