Cognitive behavioral therapy (CBT), focuses on changing how you think about yourself, how you act, and circumstances that surround how you act. It is an can treat a wide range of problems, including weight loss. Key to it is its focus on making changes and sticking to them.
When it comes to weight loss, then, specific goals can be used and can be clearly tracked. Specific goals around exercise or types of food you will eat behaviors you have control over are better than goals to improve cholesterol or glucose levels, which may fluctuate for reasons outside your immediate control.
The correct answer is C. Mood disorder or personality disorder.
Michael is not displaying any behavior that would be symptomatic of a psychotic disorder, eating disorder or impulse disorder. Sadness and refusing to socialize can be attributed to mood disorders such as depression and generalized anxiety disorder and personality disorders such as borderline personality disorder.