The results of Rosenhan's classic study illustrate that:
a. the brains of people with depression show significantly less activation when they view photos of human faces displaying strong emotions.
b. learned helplessness is a learned expectation that events in one's life are uncontrollable.
c. determining who is psychologically disordered is always a clear-cut, accurate process.
d. placing labels on individuals powerfully influences the way mental health workers perceive and interpret their actions.

Explanation: The correct answer is letter D, placing labels on individuals powerfully influences the way mental health workers perceive and interprets their actions. Rosenhan's experiment consisted in getting admitted to a psychiatric hospital people who were faking their hallucinations in order to evaluate how effective was the diagnosis.

The results were that not only hospitals were uncapable of making an accurate diagnosis but they were more interested in the diagnostic itself than the treatment; from the moment a label is put, every other action the person does will be usually explained by the diagnosis and not taken as a possible expression of something else.