What Happens to the PH of Soda Water as It

What happens to the pH of soda water as it loses its carbonation?

A) It does not change since the carbonation has nothing to do with pH.
B) It decreases as it loses the carbon dioxide molecules which form the carbonic acid in the soda.
C) It increases as it loses the carbon dioxide molecules which form the carbonic acid in the soda.
D) It decreases as the soda becomes more concentrated through the loss of the carbon dioxide gases.