A combined mass of 2.6×10⁵ kg reached a speed of 13 km/s. How much kinetic energy does it possess?
a) 2.12 × 10¹¹ J
b) 2.99 × 10¹¹ J
c) 3.65 × 10¹¹ J
d) 4.20 × 10¹¹ J