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: A chemist compared two substances in the lab. Which substance will have a higher concentration of hydrogen ions? 
 Option1: the substance with the higher pH 
 Option2: the substance with the lower pH 
 Explanation: The lower the pH value is, the greater is the concentration of hydrogen ions and the stronger the acid.
answer:
the substance with the lower pH


question:
Question: Rich lives in Chicago, Illinois while Rachel lives in Sydney, Australia. Who likely experiences more atmospheric pressure in December? 
 Option1: Rich 
 Option2: Rachel 
 Explanation: Decreasing air temperature increases atmospheric pressure.
answer:
Rich


question:
Question: John was looking at some chemicals in the chemistry lab. He saw that the lower the ph value was, the base became 
 Option1: Larger 
 Option2: Smaller 
 Explanation: The higher the pH value is, the stronger the base.
answer:

Smaller