An adult who is 5 feet 5 inches (165.1 cm) tall and weighs 90 lb. (40.8 Kg) is admitted with a diagnosis of chronic anorexia. The client receives a regular diet for 2 days, and the client's medical record indicates that 100% of the diet provided has been consumed. However, the client's weight on the third day morning after admission is 89 lb. (40.4 Kg). What action should the nurse implement?
A) Implementing a high-calorie diet plan
B) Documenting the weight loss as expected due to the diagnosis
C) Reassuring the client that the weight loss is beneficial
D) Notifying the healthcare provider of the weight loss