Water can help to fight colds, hydrate our body when we feel dehydrated etc
I suppose you mean proper nutrition. Main function of digestive system is to break down food and turn it in to energy. You have most probably heard about calories. So, 1 gram of Protein is 4 kcal, 1 gram of Carbohydrates is 4 kcal and 1 gram of Fat is 9 kcal. (also let's not forget that 1 gram of Alcohol is 7 kcal) Average male needs about 2000 to 2500 kcal a day to function properly (it's slightly less for females it depends on bodyweight, amount of muscle mass and activity level)
Along with water those are Macronutrients (carbs,protein and fat).
Micronutrients are vitamins and minerals essential for your body. For example Vitamin C, Iron, Zinc...
Now, proper nutrition is balanced diet filled with vitamins, minerals, quality sources of protein, carbs, fats and also filled with right amount of fiber which plays a vital role in your digestion by helping you with bowel movements and even lowering your blood cholesterol levels. So basically proper nutrition is connected to main function of digestive system in a way that by supplying your body with everything it needs, giving you right amount of energy it also keeps your whole body healthy at the same time.
If I had to choose I would have said A, he's going against telling his family that he believes it's important but as well as that his disregard to commitments can always make you feel like you're slipping away from your own judgement of character and in result has made himself feel bad about telling his family one thing and doing another. To achieve a fluid family life commitment and urge to stay in contact is a necessity even going through work and school, there is no harm in putting some time aside for family.
The smallpox vaccine does not protect against monkeypox.
