You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.

Q: Question: What happens to John's risk of contracting a disease as he gets older? 
 Option1: it decreases 
 Option2: it increase 
 Explanation: The older a person is, the greater their chance of developing a cardiovascular disease.

A: it increase
****
Q: Question: The reason that things don't rotate around the sun is because it is 
 Option1: small 
 Option2: large 
 Explanation: The greater the mass of the objects, the stronger the gravitational force of attraction between them.

A: small
****
Q: Question: If Milo increases the concentration of hydrogen ions in his swimming pool, what happens to the acidity of his pool? 
 Option1: increases 
 Option2: decreases 
 Explanation: With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH.

A:
increases
****