Which of the following complementary therapies has been used successfully to alleviate symptoms in veterans with PTSD?

Choice A reason: Acupuncture has been studied and used successfully to reduce PTSD symptoms, including anxiety, insomnia, and hyperarousal. It is considered a complementary therapy that can be integrated with conventional care. Choice B reason: Propranolol is a beta-blocker used for anxiety and physical symptoms of stress, but it is a prescription medication, not a complementary therapy. Choice C reason: Vitamin B12 supplementation is important for neurological health but is not specifically recognized as a complementary therapy for PTSD. Choice D reason: Prolonged exposure therapy is an evidence-based psychotherapy for PTSD, but it is not classified as a complementary therapy. It is a conventional psychological treatment.