Hannah will be traveling to Mexico with her church group over spring break to build houses. She is concerned she may develop traveler's diarrhea. Advice includes following normal food and water precautions as well as taking:.1. Loperamide four times a day throughout the trip2. Bismuth subsalicylate with each meal and at bedtime3. A prescription for diphenoxylate with atropine to use if she gets diarrhea4. None of the above