The Reaction of Nitrogen with Oxygen to Form Nitrogen Dioxide $\to$

The reaction of nitrogen with oxygen to form nitrogen dioxide gas at 25°C and 1 atm requires approximately 66.4 kJ of thermal energy.The change in internal energy is about 68.9 kJ.Which of the following is true? 2 N₂(g) + O₂(g) $\to$ 2 NO₂(g)

A) The reaction is exothermic and work is done on the system by the surroundings.
B) The reaction is exothermic and work is done by the system on the surroundings.
C) The reaction is endothermic and work is done on the system by the surroundings.
D) The reaction is endothermic and work is done by the system on the surroundings.
E) The heat and work associated with the reaction cannot be determined without more information.