Helena, a 39-year-old female, is undergoing a nutrition assessment as part of her pre-employment health evaluation. Helena is divorced and has no children; she is preparing for her new job as an administrative assistant at a local university. Helena provides a 24-hour dietary recall to the dietitian, and states that her food intake consists of mostly grain-based foods, such as cereal, bread, English muffins, and rice. Helena was diagnosed two years ago with hyperthyroidism, and although she takes medication for her condition, it has affected her food intake and her activity levels. She tells the clinician that she tries to exercise but that she usually does not have time and that she is often too tired to do so. Based on Helena's medical and nutrition history, which nursing diagnosis would be most appropriate for her condition? a. imbalanced nutrition b. self-care deficit c. impaired physical mobility d. disturbed body image e. risk for deficient fluid volume