A nurse is reinforcing teaching for a client who has a new ascending colostomy. Which of the following comments by the client indicates an understanding of the teaching?

An ascending colostomy is a surgical opening created in the ascending colon to divert fecal flow to an external pouch. Because it is located in the proximal large intestine, stool output is typically liquid to semi-liquid with high enzyme content. Postoperative teaching focuses on stoma care, expected stool characteristics, and recognition of complications such as ischemia. Monitoring stoma color is critical because it reflects blood supply and tissue viability. Rationale: A. Avoiding nuts is not a universal requirement for clients with a colostomy. While some foods may initially cause gas or blockage concerns, dietary restrictions are individualized rather than completely eliminating specific food groups. Clients are usually encouraged to gradually reintroduce foods while monitoring tolerance. B. Irrigating the colostomy every day is not appropriate for an ascending colostomy. Irrigation is typically used for descending or sigmoid colostomies to regulate bowel emptying. An ascending colostomy produces frequent liquid output, making irrigation unnecessary and ineffective. C. Expecting formed stool is incorrect for an ascending colostomy because stool at this level of the colon is still liquid to semi-liquid due to limited water reabsorption. Formed stool is more typical of descending or sigmoid colostomies where more water has been absorbed. D. A stoma that appears purple is an abnormal finding indicating compromised blood flow or possible ischemia. A healthy stoma should be pink to red and moist. Any color change such as purple, dusky, or black should be reported immediately because it may indicate necrosis requiring urgent intervention.