A client with ulcerative colitis is experiencing persistent diarrhea. What should the nurse anticipate during the assessment of the client?

A. Hypotension due to vasodilation: Hypotension from diarrhea is due to volume depletion (hypovolemia), not primary vasodilation; vasodilation is not the main mechanism. B. Dehydration due to fluid loss: Persistent diarrhea causes significant fluid and electrolyte losses leading to dehydration - this is the expected and priority assessment finding. C. Hyperkalemia due to potassium retention: Diarrhea typically causes potassium loss and hypokalemia, not hyperkalemia. D. Weight gain due to improved absorption: Ongoing diarrhea causes weight loss from fluid and nutrient loss; weight gain would not be expected.