Given the Reaction, 2NO(g)+ O₂(g) 2NO₂(g), for Which the Enthalpy

Given the reaction, 2NO(g) + O₂(g) 2NO₂(g) , for which the enthalpy of reaction is -118.9 kJ .Which one of the following actions will cause an increase in the equilibrium concentration of NO(g) in a closed reaction chamber?

A) adding more O₂(g) through an injection nozzle
B) increasing the temperature of the system
C) removing the NO₂(g) from the system
D) increasing the pressure of the system while temperature is kept constant
E) adding a catalyst