A) Dehydration: Diarrhea, especially when prolonged for several days, leads to significant fluid and electrolyte loss, which can result in dehydration. Common signs of dehydration include dry mucous membranes, decreased skin turgor, low urine output, hypotension, and increased heart rate. Dehydration is one of the most expected findings in a patient with prolonged diarrhea due to the loss of water and electrolytes from the body. B) Rigid abdomen: A rigid abdomen could indicate peritonitis or a serious abdominal condition such as bowel perforation, which is a medical emergency. This would not be expected in a patient with uncomplicated diarrhea. Rigid abdominal muscles are typically associated with acute abdominal emergencies rather than simple diarrhea. C) Hypothermia: Hypothermia is generally not associated with diarrhea. Diarrhea is more likely to cause fever or a normal body temperature due to the body's inflammatory response to infection or irritation. Hypothermia typically occurs in cases of prolonged exposure to cold or in critically ill patients, but it is not a typical response to diarrhea alone. D) Decreased bowel sounds: While decreased or absent bowel sounds can be seen in bowel obstruction or paralytic ileus, it is not typically a finding associated with diarrhea. In fact, in the early stages of diarrhea, increased bowel sounds (hyperactive bowel sounds) are often noted due to the rapid peristalsis and gastrointestinal irritation.