Which of the Following Is Not a Likely Reason for Misdiagnosis

Which of the following is not a likely reason for misdiagnosis of psychological problems?

A) People's problems often don't fit neatly into a single category.
B) Few guidelines exist for what constitutes "clinically significant impairment."
C) The DSM may not account for cultural differences in how distress is expressed.
D) There is no accepted diagnostic classification system.