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.

Ex Input:
Question: Joe is pulling a rubber band with his fingers. When does the band have the most elastic force? 
 Option1: at rest 
 Option2: when stretched 
 Explanation: The elastic force increases the more the material is stretched or compressed.

Ex Output:
when stretched


Ex Input:
Question: A small planet has a _____ pull of gravity than a small planet. 
 Option1: stronger 
 Option2: weaker 
 Explanation: Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.

Ex Output:
weaker


Ex Input:
Question: Given two equal measures of water by volume, which would be heavier 
 Option1: ocean water 
 Option2: distilled water? 
 Explanation: Water becomes more dense when it is colder and when it has more salt.

Ex Output:

ocean water