Jill is an elite gymnast. She is 16 years old and knows that this upcoming year will be her last shot to make the US team to compete in the world championship. Her coaches have been pressuring her to keep her weight down and Jill has begun restricting her calories to less than 1,200 per day. On days during which she eats more than 1,200 calories, she takes a laxative to help purge the extra energy. Her weight has stayed low but lately she has stopped menstruating. Last week she fell off the balance beam and fractured her ankle. A bone density study showed that she is at risk for developing osteoporosis. Which of the following most accurately describes Jill's condition?a. Binge-eating disorderb. Anorexia nervosac. Female athlete triadd. Bulimia nervosa