An 800-Kg Car Moving at 80 Km/h Collides Head-On with a 1200-Kg

An 800-kg car moving at 80 km/h collides head-on with a 1200-kg car moving at 40 km/h in the opposite direction.The total kinetic energy lost by the cars is

A) 0.
B) less than that lost by the cars in question 48.
C) the same as that lost by the cars in question 48.
D) more than that lost by the cars in question 48.