10. class Nav{ 

10. class Nav{  11. public enum Direction { NORTH， SOUTH， EAST， WEST }  12. }  13. public class Sprite{  14. // insert code here  15. }  Which code， inserted at line 14， allows the Sprite class to compile？（） 

• A、 Direction d = NORTH；
• B、 Nav.Direction d = NORTH；
• C、 Direction d = Direction.NORTH；
• D、 Nav.Direction d = Nav.Direction.NORTH；