A 7-year-old boy is brought to the pediatric neurology clinic by his mother with a history of 3 episodes of brief facial twitching and drooling occurring during sleep over the past 6 months. Each episode lasts less than 2 minutes. The child is developmentally normal, academically performing well, and has a normal neurologic examination. An EEG during sleep is performed. The diagnosis marked **D** in the diagram is most likely. Which of the following statements best characterizes the natural history and management of this condition?