Could you please explain the answer

V(x) The graph in the figure shows the variation of the electric potential V(x) (in arbitrary units) as a function of the position x (also in arbitrary units). Which of the choices below correctly describes the orientation of the x- component of the electric field along the x- axis? A) Ex is positive from x = -2 to x = 2. B) Ex is positive from x = -2 to x = 0, and negative from x = 0 to x = 2. -2 -1.5 -1 -0.5 0.5 1 1.5 2x C) Ex is negative from x = -2 to x = 0, and positive from x = 0 to x = 2. D) Ex is negative from x = -2 to x = 2. E) Ex is zero from x = -2 to x = 2