A deflection function d (in millimeters) for a steel beam is twice-differentiable on the interval 1≤x≤1.3 meters. Measurements show that ∣d′′(x)∣≤0.04 for all x in this interval. The tangent line to d at x=1 is used to approximate d(1.2). What is the largest possible magnitude of the error of this approximation?
a) 0.004 mm
b) 0.008 mm
c) 0.0008 mm
d) 0.0016 mm