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: Compared to the distance between the orbits of Jupiter and Saturn, which are far away from the sun, is it more likely that the distance between the orbits of Mercury and Venus, which are closer to the sun than Jupiter and Saturn, are 
 Option1: smaller 
 Option2: larger? 
 Explanation: In general, the farther away from the Sun, the greater the distance from one planets orbit to the next.

Ex Output:
smaller


Ex Input:
Question: Chris is studying two countries. He finds that China has half as many factories putting out fossil fuels into the air than the United States. Based on this information, the factories in _____ are causing more air pollution. 
 Option1: United States 
 Option2: China 
 Explanation: Because richer nations use more fossil fuels, they also cause more air pollution and global warming than poorer nations do.

Ex Output:
United States


Ex Input:
Question: In diffusion, the lighter particles move 
 Option1: faster 
 Option2: slower 
 Explanation: The mass of the particles: lighter particles will diffuse faster, because on average they move faster.

Ex Output:

faster