16. A rocket weighs 1.7 × 106 kg, where 80% of it is the fuel, and exhausts fuel with a relative speed of 2000 m/s. If the rocket is initially at rest in space, what is its speed after consuming all the fuel?
(A) 1.0 × 104 m/s
(B) 2.5 × 103 m/s
(C) 3.2 x 103 m/s
(D) 1.6 × 103 m/s
(E) 4.0 × 102 m/s

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