Apolygon is convex if and only if a segment connecting any two vertices never passes through the exterior of the polygon. if this statement is true, then which of the following statements must also be true? a. a segment connecting any two vertices of a polygon never passes through the exterior of a polygon if and only if the polygon is not convex. b.a polygon is not convex if and only if a segment connecting any two vertices never passes through the exterior of the polygon. c.a polygon is convex if and only if a segment connecting any two vertices never passes through the interior of the polygon. d.a polygon is not convex if and only if a segment connecting any two vertices passes through the exterior of the polygon.