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: 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.
[A]: small


[Q]: 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.
[A]: the substance with the lower pH


[Q]: Question: Andy put two magnets at the end of the table, Karen put two magnets right next to each other. Whose magnets had a greater gravitational force? 
 Option1: Andy 
 Option2: Karen 
 Explanation: The further objects are away from each other, the smaller the gravitational force.
[A]:
Karen