Let f be the function given by f(x) = x²e⁻ˣ. It is known that ∫₀¹f(x)dx = 0.160603. If a midpoint Riemann sum with two intervals of equal length is used to approximate ∫₀¹f(x)dx, what is the absolute difference between the approximation and ∫₀¹f(x)dx ?
A. 0.0007
B. 0.0003
C. 0.0009
D. 0.0154
