[Solved] Because of the positive externality of vaccinations, economic efficiency would be improved A)if fewer people were vaccinated. B)if more people were vaccinated. C)only if all people were vaccinated. D)only if no people were vaccinated. Bowel Obstruction: A medical condition where there is a blockage in the intestines that prevents gas, fluids, or solids from moving through normally. Chronic Cathartic: Long-term use of laxatives, which can be harmful and lead to dependency. Ileus: A temporary and often painful condition in which there is a lack of movement in the intestines, leading to a buildup of food, fluid, and gas, and causing abdominal swelling and discomfort. Fecal Occult Blood: Small amounts of blood in feces that are not visible to the naked eye but can be detected through specific tests.