You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).

Paragraph: With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH.
 Question: If Milo increases the concentration of hydrogen ions in his swimming pool, what happens to the acidity of his pool? 
 Choices: A)increases 
B)decreases
increases