Last month, Diego's neighbors paid him to take care of their fish when they went on vacation. He spent $13 of his earnings on a book and $9 on some art supplies. Afterward, he had at most $10 left. How can you best describe how much Diego's neighbors paid him?
Select the correct choice below and fill in the answer box to complete your choice.
A.
They paid him exactly $

B.
They paid him at most $

C.
They paid him at least $