KE= 1/2mv^2
KE=1/2(600•12^2)
KE=1/2(600•144)
KE=1/2(86400)
KE= 43200 J
(Is the answer would be the second option)
Evolution would be the answer you may be looking for.
1) The first reactant is incomplete.
2) The reaction is a combustion reaction and it is easy to infere that it is the combustion of the alkane with 3 carbons.
3) The general chemical formula of the alkanes is

4) Hence the equation is:

5) The name of the alkane is propane, so the word equation is:
propane + oxygen → carbon dioxide + water
6) The equation is unbalanced. This is the balanced equation:

7) It is, as the combustion of any hydrocarbon, a redox (reduction-oxidation) reaction, where the carbon is oxidized and the oxygen is reduced.
8) This kind of reactions release a lot of energy.
I believe the answer is B.
Whatever you put force into it exerts the same amount of force.