A 34-year-old woman with posttraumatic stress disorder has been treated with exposure therapy, with partial success. Her clinician is considering an adjunct medication. The agent d- cycloserine could be efficacious for reducing symptoms in anxiety disorders because it has been shown to:
A. Increase glutamate neurotransmission during fear conditioning
B. Decrease glutamate neurotransmission during fear conditioning
C. Increase glutamate neurotransmission during fear extinction
D. Decrease glutamate neurotransmission during fear extinction



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