Problem: A 54-year-old female with no significant past medical history presents to the primary care physician's office with a 12-hour history of nausea, vomiting, and diarrhea. She states that she has had six episodes of watery diarrhea and 2 episodes of emesis since symptom onset. She reports that her grandson had similar symptoms two days ago. Vital signs in the office reveal a temperature of 101.0°F, respiratory rate of 14/min, heart rate of 74/min, blood pressure is 110/70 mmHg, and a capillary refill of less than 2 seconds. What is the first-line treatment for the patient's illness? Looking for Assignment Help? A. Antiemetics B. Antidiarrheals C. Antibiotics D. Oral rehydration solution