Which complaint should a nurse consider a warning sign for cancer?

Rationale: A. Diarrhea that lasts 2 days after an all-day picnic at the beach is incorrect because this is likely acute gastroenteritis or food-related illness, which is temporary and not a warning sign for cancer. B. A painful lump under the umbilicus that recedes when pushed but comes out again with a sneeze or hard cough is incorrect because this describes a hernia, which is usually benign and not a sign of cancer. C. Persistent indigestion associated with difficulty swallowing is correct because chronic digestive symptoms, especially difficulty swallowing (dysphagia) or persistent heartburn/indigestion, can be early warning signs of gastrointestinal cancers, such as esophageal or stomach cancer. These symptoms should be promptly evaluated by a healthcare provider. D. Intense pain in an area such as a hip or groin after carrying several gallons of paint up a ladder and painting the garage is incorrect because this is musculoskeletal pain from strain, not a cancer warning sign.