One Method for the Decomposition of Carbon Dioxide Proceeds as Follows

Multiple Choice

One method for the decomposition of carbon dioxide proceeds as follows:
2CO₂(g)
2CO(g) + O₂(g) ; ΔH = 559 kJ
Which of the following changes will cause an increase in the equilibrium concentration of CO?

A) adding more O₂ to the system
B) adding a catalyst
C) removing CO₂ from the system
D) increasing the pressure of the system at constant temperature
E) increasing the temperature of the system