10 (2). Let f be a function that admits continuous second partial derivatives such that Vf (x, y) = (a'x - a’x², y² + ay) with a < 0. It can be stated with certainty that: A) f reaches a relative maximum at the point (1, 0) and f reaches a relative minimum at the point (0, 0) B) The point (0, 0, f (0, 0)) is a saddle point of f and f reaches a relative minimum at the point (0, -a). C) The point (0, a, f (0, a)) is a saddle point of f and f reaches a relative maximum at the point (1, 0). D) The point (1, 0, f (1, 0)) is a saddle point of f and f reaches a relative maximum at the point (0, 0).