A Mixture of Na₂CO₃, NaCl, and NiCO₃ Is Prepared

A mixture of Na₂CO₃, NaCl, and NiCO₃ is prepared. The common ion(s) is(are) :

A) Na⁺
B) Ni²⁺
C) Na⁺, Cl ^-
D) Na²⁺
E) Na⁺, CO₃^{2 -}