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.

Input: Consider Input: Question: If the people in Mary's country start to create less greenhouse gases, what will happen to the possibility that changes may occur? 
 Option1: increase 
 Option2: decrease 
 Explanation: As greenhouse gases increase, changes will be more extreme.

Output: decrease


Input: Consider Input: Question: When a star is moving away from a planet, the star will be pulled into it if the gravitational force is 
 Option1: weaker 
 Option2: stronger 
 Explanation: The closer objects are to each other, the stronger the gravitational force between them.

Output: weaker


Input: Consider Input: Question: Rich was examining a cliff face. Which part of the cliff is younger, geologically speaking? 
 Option1: the base 
 Option2: the top 
 Explanation: The upper rock layers are much younger.


Output: the top