Magnesium carbonate will release the greatest volume of carbon dioxide.
The carbonates are all 1:1 salts with the general formula
They react with sulfuric acid per the equation
Thus, 1 mol of each carbonate produces 1 mol of carbon dioxide.
As the carbonates react with the sulfuric acid, the sulfate precipitates will form a coating on the surface of the carbonate and prevent further access of the acid.