MOM: You need to start your homework as soon as you get home from school. You will be too tired to do it later. ISAAC: I'm tired when I get home from school because I've been paying attention in class and surrounded by people all day. I also have to clean my room and take Boomer for a walk.

MOM: Your homework is more important than both of those things.

ISAAC: I agree with you. But by the time I get home from school, I've been doing schoolwork for eight hours straight. If I had a break from doing schoolwork to take care of the other things I need to do before starting homework, I think I would be more focused. Also, I always finish my homework. It's important to me that it get done, too.

Which sentence states Isaac's argument?