Not every one, no, but whatever ones you learn about, I'll take them and decide what I want to learn from there. I'd bet it's similar here with the optional and mandatory choices.

[if he wanted to do something in exchange for the food, sizhui wouldn't say no either, but he would also want to do something in return for that because offering midoriya food would be his initial thought for him helping out with the classes. (this is a back-and-forth sort of thing, isn't it?)]