All of the following are true regarding the diagnosis of a delusional disorder EXCEPT:

A. It involves the presence of one or more delusions for at least a one-month duration.
B. The delusions can be considered either bizarre or non-bizarre in nature.
C. This diagnosis is the most disabling of all of the schizophrenia spectrum disorders.
D. Persecutory delusions are the most common type.

Ans: C. This diagnosis is the most disabling of all of the schizophrenia spectrum disorders.