A charge nurse is educating a newly licensed nurse about total parenteral nutrition (TPN) therapy. Which of the following statements indicates an understanding of the teaching?

A. TPN is used for clients who cannot absorb nutrients via the intestinal tract, typically due to issues like severe malabsorption or bowel dysfunction. B. Long-term nutritional support is typically provided via enteral feeding rather than TPN, unless the client cannot tolerate enteral feeding. C. Gastric residual is relevant for clients receiving enteral nutrition (not TPN), which involves checking for residuals in the stomach before feeding. D. TPN should be administered over a longer period (typically 12-24 hours), not 6 hours.