Read the conversation below:
Tom: "Hi, Ben. Are you free to play basketball after school today?"
Ben: "I'm sorry, Tom. I can't make it. I have to help my dad with some chores at home."
Why does Ben refuse Tom's offer?
A) He doesn't like basketball.
B) He has to do chores with his dad.
C) He has another appointment.
D) He is not feeling well.