In general, for most things, A would be correct (Any time of the day). It kind of depends on what you ar collecting the sample for. I think the earlier the better but it doesnt usually matter.
Two risks of drugs are health decline, and mental illness.
Carbohydrates: Fruit, Veggies, Milk, Yogurt
Proteins: Meats, Nuts, Eggs
Fats: Oil, Butter, Ice Cream
C. They must be certified by the AVMA.