Answer:
Choice D. I want to go to the symphony, but I don't have any money.
Explanation:
Transitioning to the reason you can't go to the symphony.
descent noun (RELATION) [ U ] the state or fact of being related to a particular person or group of people who lived in the past: She's a woman of mixed/French descent. They trace their line of descent back to a French duke.
Because they're other people who might need it, it's like how you shouldn't waste your food.
The answer is D, because it is a known fact that is it mandatory for children to go to school.