A Group of Researchers Are Studying Depression in a Sample

Multiple Choice

A group of researchers are studying depression in a sample of patients.Each researcher independently assesses the level of depression in each patient,but find that their assessments are not the same.This suggests that

A) depression cannot be studied scientifically.
B) the researchers are not using a reliable measurement.
C) the results are generalizable.
D) the patients likely do not have depression.