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


question:
Question: A moving ball that is only lightly resisted by fluid friction is likely to be quite 
 Option1: small 
 Option2: large 
 Explanation: The faster or larger a moving object is, the greater is the fluid friction resisting its motion.
answer:
small


question:
Question: Rich increased the pH value of a solution in the lab. The acid is now 
 Option1: stronger 
 Option2: weaker 
 Explanation: The lower the pH value is, the greater is the concentration of hydrogen ions and the stronger the acid.
answer:

stronger