10. If f'(x) and g'(x) exist and f'(x)> g'(x) for all real x. then the graph of y = f(x) and the graph of y = g(x) (A) intersect exactly once. (B) intersect no more than once. (C) do not intersect. (D) could intersect more than once. (E) have a common tangent at each point of intersection. (cos 30-1) de