Answer:
The correct answer is:
c. Improper washing of hands after toilet use
Step-by-step explanation:
Improper washing of hands after toilet use can cause food and water-borne infections. When individuals do not properly wash their hands after using the toilet, they can transfer bacteria and other microorganisms to the surfaces they touch, including food, water, and kitchen utensils. These microorganisms can then grow and multiply, leading to illness if the contaminated food or water is consumed. This is why it is important to practice good hygiene, including proper handwashing techniques, to prevent the spread of infection.
Boiling drinking water and washing raw foods before eating them can also be important in preventing the spread of infection, but they are not the most common cause of food and water-borne infections. Covering the nose and mouth when sneezing is important in preventing the spread of respiratory infections, but it is not directly related to food and water-borne infections.