Final answer:
Dana's behavior of avoiding eating and obsessing over thinness indicates she has anorexia nervosa, an eating disorder characterized by maintaining a low body weight through starvation and excessive exercise, and having a distorted body image. The answer is option A.
Step-by-step explanation:
The disorder described in the question, where Dana is avoiding eating, halting her body's development, obsessing over food and an unattainable image of 'perfect' thinness, is anorexia nervosa. This is an eating disorder characterized by an individual intentionally maintaining a body weight that is well below average through starvation and potential excessive exercise, often accompanied by a distorted body image.
Individuals with anorexia nervosa may view themselves as overweight even when they are dangerously underweight and may also exercise obsessively in an attempt to lose more weight despite severe undernourishment. This condition can lead to serious health issues such as malnutrition, amenorrhea, and even death if untreated.