Tourette Syndrome Is Characterized by Involuntary Vocalizations or Movements Called

Tourette syndrome is characterized by involuntary vocalizations or movements called tics. Unusual behaviors are displayed by the individual, such as shouting obscenities, jerking their head, or blinking their eyes. The individual has no control over these behaviors. The most disabling form of Tourette syndrome includes motor movements that result in self-harm. Which of the following is correctly known about this disorder?

A) Age of onset is between 12 and 16 years of age
B) Physiological effect of a substance
C) Physiological effect of a medical condition
D) 200,000 Americans have the most severe form of Tourette syndrome