Final answer:
In a closed system, no matter is added daily due to the law of conservation of matter, making the correct answer 'None'.
Step-by-step explanation:
In a closed system, the law of conservation of matter dictates that no matter is added or removed from the system. Consequently, the amount of matter remains constant over time. Even if the system undergoes various processes internally, the total mass must stay the same. Therefore, the correct answer to the question of how much matter is added daily to a closed system is a) None.