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: As two objects move apart, the force of gravity between them 
 Option1: increases 
 Option2: decreases 
 Explanation: Objects that are closer together have a stronger force of gravity between them.

Ex Output:
decreases


Ex Input:
Question: Bob is testing samples of ocean water from different places. The sample of water from off India's coast has less dissolved carbon dioxide, than the sample of water from off the United States' coast. Therefore, the water from _____ coast is more acidic. 
 Option1: India's 
 Option2: United States' 
 Explanation: With higher levels of dissolved carbon dioxide in ocean water, the water becomes more acidic.

Ex Output:
United States'


Ex Input:
Question: If Mona is exploring and aquifer and she dives deeper down into it, what happens to the levels of fossil water she encounters? 
 Option1: they increase 
 Option2: they decrease 
 Explanation: Deeper aquifers typically contain older 'fossil water.'

Ex Output:

they increase