Consider the following exothermic process at equilibrium: CO(g)+H2O(g)⇌CO2(g)+H2(g)

Which of the following changes would increase the amount of H2(g) present in the equilibrium mixture?

Consider the following exothermic process at equilibrium:

Which of the following changes would increase the amount of present in the equilibrium mixture?

decrease the temperature
increase [CO2]
increase [CO]
increase the volume of the container in which the reaction occurs.
more than one of the above
(Answer is not increase [CO])