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.

Example Input: Question: Jeffrey decreases the number of carbon atoms to a natural gas hydrocarbon in a lab. The isomers 
 Option1: increase 
 Option2: decrease 
 Explanation: As you increase the number of carbon atoms in a hydrocarbon, the number of isomers quickly increases.
Example Output: decrease

Example Input: Question: If greenhouse gas were to be halved, the global temperature would 
 Option1: increase 
 Option2: decrease 
 Explanation: A decrease in greenhouse gas levels decreases global temperature and an increase raises global temperature.
Example Output: decrease

Example Input: Question: Jeff built a lens with the highest refraction possible. The lens is likely _____ curved. 
 Option1: very 
 Option2: not 
 Explanation: The more curved the surface of a lens is, the more it refracts light.
Example Output:
very