A 100 Kg Mass Is Blown Apart into a 50 $\times$

A 100 kg mass is blown apart into a 50.0 kg piece and a 50.0 kg piece.After the blast,the two masses are moving apart with a relative velocity of 100 m/s.The total kinetic energy after the explosion is

A) 8.42 $\times$ 10⁴ J.
B) 1.25 $\times$ 10⁵ J.
C) 3.62 $\times$ 10⁵ J.
D) 6.50 $\times$ 10⁵ J.
E) 1.24 $\times$ 10⁶ J.