Suppose you write a system of equations to find out which of two video stores is cheaper to join, depending on the number of videos you will rent. You solve the system and find that it has infinitely many solutions. What would that mean in terms of the problem? A. One video store is more expensive than the other no matter how many videos are rented.

B. One video store is cheaper up to a certain number of videos rented, and then the other is cheaper.

C. Both video stores cost the same no matter how many videos are rented.

D. The problem cannot be solved.