Carl wrote this expression to describe the total dues he has left to pay.

y – 15

Which situation could be described by this expression?

A.
Carl knows he has to pay $15 in dues. He does not know how much he has paid.

B.
Carl knows he owes $15 in dues. He does not know how much he has paid so far.

C.
Carl knows he has to pay $15 in dues. He does not know how much he has left to pay.

D.
Carl does not know how much he has to pay in dues. He does know that he has paid $15 so far.