A. Avoiding fresh flowers in the room is unnecessary for a child with Clostridium difficile. Fresh flowers are typically restricted for clients who are immunocompromised, such as those undergoing chemotherapy or organ transplants, rather than those with infectious diarrhea. B. Using an N95 respirator is incorrect. Clostridium difficile is transmitted via the fecal-oral route and requires contact precautions, not airborne precautions. An N95 mask is only required for airborne pathogens like tuberculosis or measles. C. Initiating contact precautions is correct. Clostridium difficile is highly contagious and spreads through spores that can survive on surfaces. Contact precautions, including the use of gloves and gowns and proper hand hygiene with soap and water, help prevent transmission. D. Placing the child in a room with a HEPA filtration system is unnecessary. HEPA filtration is used for airborne pathogens, whereas Clostridium difficile is spread via direct and indirect contact rather than through the air.