Answer A )
Potassium chloride
K+ Cl-
hope this helps!.
I had the same question last week and my answer was C. Try that.
If a solution is saturated, that means it already posses the maximum number of solutes thus have been dissolved in it, and thus the concentration cannot be increased.
C because the sodium (cation) bonds with the sulphate (anion) and then chloride (anion) and hydrogen (acting as a cation) bond together
