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How is swallowing different from peristalsis?

A. Swallowing is voluntary and happens mainly in the esophagus, peristalsis is involuntary and happens in the pharynx

B. Swallowing and peristalsis are basically the same

C. Swallowing is involuntary and happens mainly in the pharynx, peristalsis is voluntary and happens in the esophagus

D. Swallowing is voluntary and happens mainly in the pharynx, peristalsis is involuntary and happens in the esophagus

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