Answer :
Final answer:
Optimism is not a cause of mood disorders, while genetic vulnerability, negative thinking, and learned helplessness are.
Explanation:
Optimism is the correct answer as it is not a possible cause of mood disorders. In contrast, genetic vulnerability, negative thinking, and learned helplessness are all known factors contributing to mood disorders.
Learn more about Mood Disorders here:
https://brainly.com/question/47426357