Final answer:
Feeding raw meat is not an effective means of preventing parasitic infections in dogs and cats and can lead to infections like toxoplasmosis, whereas regular grooming, vaccination, and proper sanitation are effective preventative measures.
Step-by-step explanation:
The option that is not an effective means of preventing parasitic infections in dogs and cats is d) Feeding raw meat. Raw meat can be a source of parasites and can lead to infections like toxoplasmosis. Humans can become infected by consuming undercooked or raw meat that contains parasites, and it's possible for cats to be exposed to these parasites when they consume raw meat as well. Hence, to reduce the risk of parasitic infections, it is important to ensure all meat is cooked to an internal temperature of at least 73.9-76.7 °C (165-170 °F). On the other hand, regular grooming, vaccination, and proper sanitation are effective means to prevent parasitic infections in pets.