Answer:
[tex]B\text{ : decreases}[/tex]Explanation:
Here, we want to know what happens to a solution that becomes more acidic
A lesser ph (1-7) indicates acidity with the acidity being higher as the number becomes smaller
What this means is that a solution with a pH of 3 is more acidic than a solution with a pH of 5
Thus, when the acidity increases, it is expected that the pH of the solution decreases (it becomes smaller in number)