Which of the Following Statements Best Describes Our Knowledge of the Level

Multiple Choice

Which of the following statements best describes our knowledge of the level of the person in the development if bipolar disorder?

A) We know surprisingly little about how events at the level of the person contribute to the development of bipolar disorder.
B) Research has not been conducted about the effect on bipolar disorder of events at the level of the person.
C) It has been conclusively determined that bipolar disorder is exclusively contributed to by events at the level of the brain and by no events at the level of the person.
D) At the level of the person it has been found that a deficit of serotonin combined with an excess of norepinephrine contributes to the development of bipolar disorder.