I would say the best answer is B. Asking the learner to begin working on a problem.
The answer is bulimia nervosa :)
The median age of onset for bipolar disorder is 25 years (National Institue of Mental Health), although the illness can start in early childhood or as late as the 40's and 50's. An equal number of men and women develop bipolar illness and it is found in all ages, races, ethnic groups and social classes.
