The correct option is B Increasing the volume of reaction container to two times of its initial value
Increasing the volume of reaction container twice, the concentration of all the species will reduce to half.
Increasing the pressure will not have any effect on the concentration of the reactants and the products, so equilibrium position will not shift.
For the same reason adding helium gas will also does not affect the equilibrium.
Adding CO2 gas will shift the reaction towards backward direction according to Le Chatelier's principle.