Final answer:
The statement made by the client that indicates a distorted body image is option 3: "I know that I am thin, but I refuse to be fat!"
Step-by-step explanation:
A client diagnosed with anorexia nervosa stopped eating 5 months ago and lost 25 pounds. The statement made by the client that indicates a distorted body image is option 3: "I know that I am thin, but I refuse to be fat!" This statement reflects the client's belief that they are thin, despite actually being underweight. It demonstrates the client's unrealistic perception of their own body size and shape, which is a common characteristic of anorexia nervosa.