8. The mixing of which pair of reactants will result in a precipitation reaction?
(A) CsI(aq) + NaOH(aq)
(B) HCl(aq) + Ca(OH)2(aq)
(C) K2SO4(aq) + Hg2(NO3)2(aq)
(D) NaNO3(aq) + NH4Cl(aq) 

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