Chastity was initially excited to make the cheerleading squad. However, her parents noticed that she stopped eating dinner with them, wanted to help make most meals, and had a list of good and bad foods. She began portioning and weighing the food she ate, and sometimes would claim to have already eaten. Most concerning was the significant weight drop from a healthy 115 pounds to 90 pounds. This case most clearly illustrates symptoms of

Anorexia nervosa

Explanation:

Anorexia nervosa,  is a potential life threatening eating disorder, in which nindividuals  undergo self starvation  or restrict the number of calories they consume in order to loose weight  because they think  they  are overweight when in truth, they are underweight.  Anorexia is generally characterized by low weight, food restriction, fear of gaining weight,distorted body image, extremely thin body etc

here, Chasity who  began portioning and weighing the food she ate, and also  claiming  to have already eaten giving rise to  significant weight drop from a healthy 115 pounds to 90 pounds typically illustrates the symptoms of ANOREXIA NERVOSA

c is the answer for this

answer; lorenz;