A single-step numerical approximation with step size h=0.4 gives an absolute error of 0.048 at the target point. Assuming the global error is approximately proportional to h, which of the following is the smallest integer denominator n such that using a step size h=n0.4 is predicted to reduce the error below 0.01?
(a) n=4
(b) n=5
(c) n=2
(d) n=3