The equilibrium `SO_(2)Cl_(2)(g)hArrSO_(2)(g)+Cl_(2)(g)` is attained at `25^(@)C` in a closed container and an inert gas, helium is introduced. Which of the following statements are correct?
A. Concentration of `SO_(2), Cl_(2)` and `SO_(2)Cl_(2)` change
B. More chlorine is formed
C. Concentration of `SO_(2)` is reduced
D. None of the above