Which of the following is correct? A. If a consumer's preference relation is non-transitive but convex, then the demand may have non-convex values. B. If a consumer's complete and transitive preference relation is represented by some utility function that is not continuous, then the preference relation cannot be continuous. C. If a consumer's preference relation is monotone but disocntinuous, then its utility representation (if exists) may not be monotone. [A function is monotone if for all x,y with xi yi for all i, f(x) f(y), and for all x,y with xi > yi for all i, f(x) > f(y).]