What Did David Rosenhan Describe in "On Being Sane in Insane

Multiple Choice

What did David Rosenhan describe in "On Being Sane in Insane Places"?

A) Although it may be difficult for the rest of us, psychiatrists can easily differentiate between those who are mentally ill and those who are not.
B) Researchers posing as "pseudo-patients" in a mental hospital but otherwise acting normally were treated as mentally ill by the hospital staff.
C) Patients were unable to determine who among them were really researchers posing as "pseudo-patients."
D) Researchers working in mental hospitals started to develop higher rates of mental illness.