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: 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.
[A]: United States


[Q]: Question: Marty watched the cruise ship sail closer and get _____. 
 Option1: larger 
 Option2: smaller 
 Explanation: If you are standing on the shore and a ship is going out to sea, the ship gets smaller as it moves further away from you.
[A]: larger


[Q]: Question: If Milo is flying through the air and he moves closer to the Earth, what happens to the temperature of the air? 
 Option1: increases 
 Option2: decreases 
 Explanation: Air in the troposphere is warmer closer to Earths surface.
[A]:
increases