You enjoy playing chess and scrabble. You want to play a total of at least 10 games (condition A), but you have only 6 hours to do it. The graph represents the constraints on the number of chess games C and Scrabble S that you play. What is the greatest number of chess games that you can play while meeting both conditions?

A. 3 chess games at most
B. 4 chess games at most
C. 6 chess games at most
D. 7 chess games at most​