Which of the Following Best Explains Why Conversion Disorder Is

Which of the following best explains why conversion disorder is a less common diagnosis today than it was historically?

A) Advances in the psychiatric profession have decreased the prevalence of all disorders linked to traumatic events.
B) Advances in the medical field have facilitated the determination of organic causes for physical dysfunctions.
C) Those once diagnosed with conversion disorder are now more likely to be diagnosed with PTSD.
D) Today's psychiatrists tend to view this diagnosis as one that lacks reliability and validity, thus they are hesitant to even consider it as a diagnostic option.