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: 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: Ron went to the gym and lifted weights for the first time. If he keeps going consistently, his muscles will likely 
 Option1: grow 
 Option2: shrink 
 Explanation: Anaerobic exercises cause muscles to get bigger and stronger.

Ex Output:
grow


Ex Input:
Question: Ron is trying to figure out how old some isotopes are. The isotopes are decaying very slowly, so they are likely specimens that are 
 Option1: older 
 Option2: younger 
 Explanation: Because these isotopes decay more slowly, they can be used to date much older specimens.

Ex Output:

older