Which of the following statements best characterizes the treatment course and progression of bulimia nervosa?
1) Bulimia nervosa is a chronic condition that typically worsens over time.
2) Bulimia nervosa is a condition that can be cured with proper treatment.
3) Bulimia nervosa is a condition that often improves with age.
4) Bulimia nervosa is a condition that has a stable course with no significant changes over time.
