Which of the following was presented in the text as evidence of biological influences on anxiety disorders?

A) Identical twins often develop similar phobias.
B) Brain scans of persons with obsessive-compulsive disorder reveal unusually high activity in the anterior cingulate cortex.
C) Drugs that dampen fear-circuit activity in the amygdala also alleviate OCD.
D) All of these findings were presented.

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Rianna Jackson · Accepted Answer

Final Answer : D, Explanation :  All three of these findings were presented as evidence of biological influences on anxiety disorders. Identical twins often develop similar phobias, suggesting a genetic component to anxiety disorders. Brain scans of persons with obsessive-compulsive disorder reveal unusually high activity in the anterior cingulate cortex, demonstrating a neurological basis for the disorder. Drugs that reduce fear-circuit activity in the amygdala can alleviate OCD symptoms, indicating the role of neurotransmitters in anxiety disorders.

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