2016 AP Calculus BC.1: Arc length, distance traveled

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Which of the following gives the length of the curve defined by the parametric equations x(t)=t^2/2 and y(t)=t^3/3 from t=0 to t=1? ( )
2016 AP Calculus BC.1: The Arc Length of a Smooth, Planar Curve and Distance Traveled (BC Only)--Applications of Integration