Researchers Have Discovered an Association Between Depression/anxiety and Pain

Researchers have discovered an association between depression/anxiety and pain. How do they explain this association?

A) People who are prone to anxiety and depression have lower levels of endogenous opioids.
B) Anxious and depressed people are more sensitive to pain and less able to cope with it.
C) Anxious and depressed people are more likely to become involved in accidents as a result of high levels of distractibility.
D) People who are anxious and/or depressed have learned that reporting pain symptoms is a prime means of gaining attention from friends and relatives.