Which Statement Best Describes Research on Anxiety and Comorbidity with Physical

Which statement best describes research on anxiety and comorbidity with physical disorders?

A) People with physical conditions (e.g., thyroid disease, respiratory disease) are more likely to have an anxiety disorder.
B) The anxiety disorder most often begins after the physical disorder.
C) There is no greater impact on quality of life with a comorbid anxiety disorder and physical disorder than with either alone.
D) There does not seem to be a relationship between developing a physical disorder following from anxiety disorders.